I bought the Nirvana II and am very pleased with it. I heard the RTR version had poor electronics, so I got the "naked" version w/o electronics (from SailRC.com), and installed two high-torque metal gear servos and a Spektrum DX5e/AR500 2.4GHz radio system. If you buy it from SailRC.com, they will give you a login to their "Nirvana Tips & Tricks" website, with several good tips to improve the waterproofing and reliability of your Nirvana.