I've had three H9 US 120s. Rvator has a US 60 with a OS 91FS and he's been flying it for over a year. It's his second plane. The US is only a few dollars more that he GP but it's really made well. You don't have to use the quad setup if you don't want to and it'll save you two servos. This thing jumps off the ground in just six or seven feet.