I've used a CLE for years and years, and love it despite having a Hexar RF and a bunch of Leica M bodies. The CLE is small and handles quickly due to the AE. The meter is extremely accurate in my experience. I don't know about repairs 'cause i never had a problem in 15 years of use. I started with the 40mm M-Rokkor and loved it, but then sold it to buy a 40mm CV Nokton single coated version for the extra stop. Still evaluating the Nokton. It's sharper than the Rokkor for sure, but somehow loses in "character" of the shots.
If I were buying a CLE today, I wouldn't get it from Ebay or the internet - I would find someone (private person or shop) that I could trust and which perhaps gave a chance for return if there's a problem, and then shoot a roll or two to test the camera out. Light seals might be de-composing by now, but I replaced mine myself a few years ago with no trouble.
I usually use my CLE on automatic, but between every roll, I put it on Manual and run up and down the speeds a couple of times in order to exercise" the shutter speed dial contacts and the manual speed mechanism. As I've said, my camera has always worked flawlessly. The black finish of the body is starting to show a bit of silver on the edges, but it has held up very very well.
The 28mm framelines on the CLE are GREAT! The 90mm lines are REALLY SMALL. I pretty much only ever use 40mm and 28mm with this camera.
Another CON with the CLE for me, is that a 35mm Leica lens does not bring up the 40mm lines (28mm lines come up). Otherwise I would use my 35mm Summicron or Summilux on the CLE instead of the 40mm Nokton.
Good luck, and enjoy it if you go for one!