I have had a few deadsticks with my Tower .46 on my Great Planes Super Sportster, but I am to stubborn to remove it off the Plane. The unbelievable amount of power that this engine produces on one of its good days outweighs the bad days for me. I have yet to see another engine in its class that screams like a Tower .46 when its running good, which is about 50/50. There are many engines out there that are certainly more reliable like the TT .46 or the O.S SF .46, but for raw power there isn't another .46 size engine that will touch it, except when it dies and then there is no power. There are many bad points to argue about the Tower .46, but I don't think anyone will complain about them being underpowered unless they recieved one that was just total junk from the Factory, or it was broke in improperly. I have several other 2 stroke engines like the GMS .47(Same maker,not same engine), O.S .46 AX,and LA, EVOLUTION .46,TT GP.42, and just sold my O.S .40SF. The Tower .46 outpowers all of these by leaps and bounds. This is not just going by tech specs, but by seeing and believing. Is it a better motor than most?.................Of course not! The Tower is famous for being contrary, but I am just hooked on all that power in that small package! If they can ever get this engine refined, and work some of the bugs out, plus hold its current power output, it would be the best thing since Hot Apple Pie!