Ground, I have about 8 flights on an US 1.20 with Saito 1.80. My previous "big plane" experience was with two Cap's, one with the Saito and the other with a 1.60 Gasser. My US1.20, in a nutshell, is an incredible plane to fly. The most fun of anything I have had, including a couple of funflys. I think the 60 would be awesome also, but if you got the motor, you will be glad you got the 1.20. The 1.80 gives it absolute unlimited vertical perfromance. The incredible thing about this plane is that it lands like a trainer, but flies like a full-up aerobat if you want it to. It seems to handle both speed and slow flight equally well. I think these big Ultra Sticks probably have the widest flight evelope out there. My 1.20 was also of incredible quality: covering, fit assemble, you name it. The assembly time time is also really short, maybe 10 hours tops and a lot of that is to let the glue dry. another plus of this plane is the high wing. Makes the plane very easy to work on. Hope I didn't get to carried away here. As you can tell I love this thing.