Initial Impressions
I was expecting something fast and controllable. Like a Bryce FX only spinnier.

Speed
Sriver G3 is fast. In my opinion as fast as Tenergy 05, but with less spin and "oomph" (less catapult on contact).  Faster than all the other Srivers (obviously) but easily slower than Bryce Speed and Tenergy 64. It was still a step up for me considering the fastest backhand I'm used to was G2 FX.

"Spin"
The top sheet is grippy and what you'd expect from something in the Sriver series.  I particularly liked the backspin serves. Side spin was average for me, because I tended to make bigger strokes and G3 had more power than I was used to.  With that said, the issue here is more to do with my technique than the rubber.   Overall, the rubber is good at generating spin. 

Hardness
The sponge hardness is medium.  The packaging says 38 degrees.  I use it on my backhand but it's definitely usable on the forehand for an intermediate player.

Serving
Sriver G3 has plenty of controllable gears. Serves are easy to manipulate. All my serves go exactly where I want them to go and they are either spinny or fast. Serving has never been troublesome for me as it has some players I know but G3 just makes things even easier.

Chopping
This is my biggest issue with this rubber. The ball goes higher than intended most times but I guess its because I haven't adjusted my technique from softer rubbers.  This rubber is terrible for defensive dynamic chopping like Joo S.H.'s as it has too much bounce.

Hitting/Smashing
Hitting with G3 is a breeze. I simply love it. I feel as if my racket vibrates after a hit. I know its odd and a tad crazy but Sriver G3 feels like a less bouncy, spinny but more controllable version of T05. Hitting is very easy and not much effort is needed to produce a moderately fast ball and when you do put in that effort, the outcome will please you.

Looping 

Looping backspin, side spin and no spin balls isn't as easy to do compared to other tensors but it isn't particularly difficult either.  You may need to slightly adjust your technique slightly so you can work consistently with this.  The loops generally have a high throw angle. 

Blocking 

Blocking is a breeze and G3 can play a nice defensive game. When I hit the ball, I have felt confidence like never before. Its a consistent rubber and I typically don't like harder backhand rubbers, as most players don't.  

Control
G3 has excellent control. The ball goes close to, if not exactly where I intend to place the ball and serves well.

The Sriver G3, is an awesome all around rubber suited for the modern day offensive player. More seasoned players may not appreciate this as much as I have since control will be less of an issue and once that's factored out of the equation, there are other rubbers that can do what the G3 can better.

 

Im from NZ as well

 

I use both of these rubbers, and both are very good in my opinion. The speed of roundell is just below the G3. The top sheet is softer and sponge is more elastic. The topsheet of roundell produces great spin on opening shots and over the table shots, it does start to lose some of it's bite when well back from the table. The G3 topsheet is less spinny of softer shots but has huge spin when really driving the ball. You can generate slow spinny shots with G3, but requires more touch than roundell.

 

The G3 sponge has typical sriver feel - a bit dull (i've just ordered some rubber cement to glue it up with and try to liven it up a bit in the feeling department) but has huge top end power. The G3 is basically a much more controllable Bryce Speed with a higher throw.

 

The roundell is an excellent backhand rubber as it responds superbably to wrist movement. Both rubbers are excellent on the short game.

 

I currently have G3 on forehand and roundell on backhand, really enjoying this combo. Both are hugely underrated IMO - and the big plus is that they don't have any factory tuning in them and won't die on you after 3 weeks. Both will last months of heavy usage.

 

Bump for this question - anyone tried 1.9mm. Does it bottom out at all ??

 

The 2.1mm is nearly impossible to bottom out - I would expect the 1.9mm to be sufficient for 95% of plays. Would be nice to hear someones experience though.

It's definitely a good rubber but at that price, it's not worth the purchase unless the buyer can't play anything else than Sriver G3. Within that price range you can get way better tensors

I think it's still a solid all around rubber, comparable to Nittaku's Fastarc C1 but still quite slow in comparison to modern tensors. 

If you're wanting an ALL+/OFF- type rubber on your backhand instead of G3, I think Rozena is a reasonable option.  In my experience it plays best on a stiff blade and the characteristics are between 64 and 80 but slower, less spinny and less reactive than both. 

I played 4 years in Korea and saw exactly ONE sheet of Sriver in use by a player ever. Never saw any G2, G3, or Mark V. Forum fan repeaters seem to keep the pulse alive on those old rubbers.

Greg Letts' BTY Board Meeting cartoon vid is where BTY spilled the beans on their future plans...

After a session with this rubber I found that it suits me pretty well on backhand.

Its grippy but not too spin sensitive, has enough kick but not bouncy and the weight is few grams lower than T05. We'll see how long it will last but so far it was worth the $34. 

Hopefully I wont fall in love with it because then ill have to find a replacement when the time comes.

Hey opinari where do you get your Roundell from? Might try it after g3 wears down.