The PNP( and RTF ) concepts do indeed get you in the air in absolutely minimal time. The Avistar that I learned on, and still fly four years later, was an RTF. Early on I replaced the 40LA with a OS46fx. The plane has held up well, even through the rough treatment that 1st trainers invariably receive. I`ve also opted for the PNP model of the Hangar 9 Pulse XT 40. Hangar 9 generally has a reputation for quality ARFs, and I`ve certainly found the Pulse to be no exception. Great flyer, lands easy, good practice for tail dragger handling and will do all the aerobatics that a sport flyer like me would want. With PNPs and RTFs you are agreeing to go with the installed hardware and engines, unless you choose to switch something out. They won`t teach you much about building, but PNP and RTF is a boon to pilots who don`t have time, space, equipment or a desire to build and just want to fly.