I'm going to Rainbow Air in September and will be renting their newish Archer III. I have found them very easy to deal with, sometime a little slow on replies but overall ok. I've got around the 600 mile limit so I think it just depends on your own circumstances experience etc. With regard to Air Desert, they are ok too the only problem is that I wanted their Arrow and my friend (works for BA) visited them in May and said the Arrow was a bit of a wreck and had clearly been used and abused so he put me off that. Rainbow was the next choice and I was "sold" on the idea of renting a 3 year old plane so that was that. Another plus point is that I was able to deal with Jim Powell of UK Flight Training here in the UK who has set everything up including hotel accomodation. This was then all confirmed in an e-mail by Dave Parsons VP of Rainbow Air.