I love my KO's. I have been using them since the Euros. I currently use a LDT, but after 3 months I am just starting to like it and almost switched back. My kids use a EX-RR and EX-2. Completely reliable without issues. Definitely invest in the LiPo base and LiPo. New radios will be here at the end of the month, so any EX-RR's in stock will likely be discounted. There were a few for sale and a huge discount in the for sale section here. I would have no worries buying a second hand transmitter and receiver.