My biggest hassle with tubulars didn't have to do with the tubulars themselves, just the sealant I used to fix a slow leak (it totally clogged the valve). Oh and the time I broke a spoke and the wheel had internal nipples, so I had to take off the tubular and I did such a great glue job that I tore the base tape. But like I said, that had less to do with the tubulars themselves.
As to installing, I put a new one on last night. I had pre stretched and preglued it, so it was ready to go. Another coat of glue, snugged it on, pumped it up, a little adjusting, repumped, done. 10 minutes, max, easy peasy.