This is a nice simple - no frills model that flys well. If you plan to put a serious motor in it, you might want to increase the incidence of the horizontal stabilizer, or positive decalage. Mine had a tendency to really climb, especially at the higher speeds. Adding about 1.8 degrees positive to the stab seems to be about right for mine. Using a Scorpion 4025 SII 520 kv motor on 6 - cell 5000 mAh & APC 14 x 10 gives me all the speed I need. The flaps only drop to approximately 25 degrees, but I haven't found a need for more. It would be nice if the air scoop had been made with a bit more detail and shape like some of the more expensive designs, but I guess if you want that kind of detail - you'll need to pay quite a bit more. All in all, it's a very nice bargain - that flys great.