I have a lift up door, i prefer it to be fair, hose doesnt get stuck on doors which is highly annoying, as mentioned slight protection from weather...or just get in vehicle lol. And you can shut door down on hose if you feel like it.
And mentioning the key sitatuation, my mates kid went to get something out the back of his van the other day, left the keys in the back and shut the door...guess what, clonk. RAC was there hours no good because vw have made them supper secure. He rang a locksmith (we're in the wrong job lads) my mate said he was there went to get a beer, and within 2 minutes doors were open...and my mate was £160 worse off!