Tower trainer is an excellent plane. The Arrow and the Avistar are a bit more capable in the aerobatics department because of their semi-semetrical wing designs (they fly inverted better which improves the look of rolls and other manouvers that require the plane to fly inverted). To bash the Tower Trainer's construction sounds like he just wants to sell a more expensive plane (that he has in stock). Between the Arrow and the Avistar they both have possitives and negatives. If you go for the RTF packages the Avistar only comes with an OS .40 LA and it can be a challenge to get it airborne from a grass feild that needs to be cut. Put a bearing .46 on the avistar (like the other two come with) and it is awsome. I have flown all three of these planes and would recomend any of them as good trainers that you could not go wrong with.