I think that we can all agree that the situation with guns with respect to MAME cabs is murky and confusing at best. My head still hurts when I think of that GunCon thread.
Having said that, there is a reason why these threads run long ... and a reason why people thirst for a short answer. The issue runs deeper than it does with many types of controls and the issues may not be clear to folks.
People should not mistake encouraging discussion and concious recognition of realities with dissing a product (really, how can you say that there is nothing wrong with being critical and in the next paragraph imply that there is ?). It is funny that some of the folks taking heat for suggesting looking beyond a simple yes or no are folks who actually own the product and are happy with it.
I, for one, am happy about the Aimtrak and think it is a probably a great product. I would prefer a solution that doesn't require a sensor bar and can be used at closer range. BUT, having a working solution is always a GoodThing(tm). For me, once I wade through my current projects, I will probably end up buying a pair of Aimtraks and turning my JAMMA gun cabinet into a MAME gun cabinet (and moving it somewhere where it has the clearance required to accommodate the sensor bar).
If you actually want just a short answer, I would suggest waiting a while ... it hasn't been long and your sample size isn't particularly large.
I seem to remember lots of people being happy with their Act Labs guns in the early stages. Same thing with GunCon.
The big difference here is that we have a responsive vendor who is dedicated to the hobby, so my hopes are high that we will have a solid solution (even if I might prefer another).