|We had ClearCase (CC) for about a year and it was very ugly to work with it.
It didn't work intuitive at all, thinking of the 'config specs' gives me the creeps.
On the first sight one can see that CC is a very old dinosaur, with it's old MOTIF-GUI, set on top of a command-line tool. Patchwork. When I first tried to set up an UCM process, ClearCase answered with some errors - the GUI couldn't find some commands - not inspiring confidence.
There seemed to be a few developers of CC which saw how NOT to build an SCM Tool.
They seem to have learned a lot and started to make a new tool years ago:
My collegue had worked with AccuRev in his former company, so it attracted our attention when he talked about it.
After a period of evaluation, we switched to AccuRev in our company, beginning of 2008, and we are very happy with it.
E.g. concept, performance, handling, support are all excellent... the contrary of CC.