I had one and ended up selling it ! First of all I only had it about 2 months and the string blew up in my face on a 3D shoot and Mathews would not replace it and blamed it on me ! It ended up bending the cams that needed replaced which Mathews did replace !
I could not get a consistent grip on it so my grouping was all over the place ( didn't like the squared off grip) I was not very confident shooting the bow and never could get the good groups I wanted and it seemed like every time I shot it I had to readjust something so I sold it and went back to Bear bows and the first time I shot my new Kuma 30 all my arrows were touching so I'm very happy with it.

On another note the Triax is very quiet and has a very smooth draw

 

I fell into one this year for real cheap after I had problems with my Elite right before the season.

Pros:
It doesn't feel as short as it really is. The huge cams, at full draw help mitigate the severe string angle.

It is fast, quiet, and almost no hand shock.

Having never even considered a short bow before, I did like its maneuverability in the tree. I hunt from a saddle and that ease of getting the bow over the bridge is nice.

Cons:
Coming from a 33 inch bow, it is, well....short...obviously. I don't compete or anything, but I think I am a pretty good shot. I picked it up days before the season started and shot pretty well with it right from the start. Not great, but adequate. But I still don't think I shoot it as well as my Elite and I don't think I'll ever get there, it's just not as forgiving as a longer axle to axle bow, and never will be.

The draw cycle to me is a little harsh, BUT that's coming from my Elite that are regarded for having a butter smooth draw. I'm not great about back tension, and it is a little jumpy to me. I accidentally flung an arrow in the general direction of a buck this year due to that....

The stock Mathews grip as is reputed, is kinda polarizing. It felt weird at first, but I've grown to like it, actually.

I perceive the Triax feels heavy, at least more than it should for a bow that short anyway. How the actual weight stacks up vs. a bunch of comparable models, I have no clue.

Another thing I notice, I try to practice shooting when it's really windy out, as those are tough shooting conditions we encounter a lot. I notice my sight picture getting blown all over the place with it. I think it's just the riser and limbs having a larger profile.

 

Last week my 14 year old son decided he wanted a new bow for Christmas.I took him to a shop last thursday and had them set several bows up at 27" and 60lbs.I really thought we'd walk out with a new Hoyt but he kept going back to the VRX 28 which is similar to the triax.I was surprised because it was the heaviest bow but he liked the draw cycle,back wall and the way it was absolutely dead in hand at the shot.We set it up,tinkered around with it at home and he's shooting it very well.His old bow was a Bowtech fuel set at 26" and 55lbs.He can't get over how much more penetration this bow gets in a 3D target.I just finished making him some gold tip hunters today while I'm at work.We'll get some broadheads tuned on thursday and then he'll be ready to kill some deer in the late season.