Well, I work as electronic designer, (smps), and I have used cadstar, altium, pulsonix and eagle.
Eagle was MASSIVELY simpler than the others....it was easy, I never got stuck.
I once took on a smps contract, and they insisted on cadstar...so I bought cadstar for ~£2500.
I couldn't get into it quick enough, and they got rid of me before i'd really cut into the design of the smps. I had previously used cadstar at a domestic goods company, but still struggled.
After being sacked, I stopped using cadstar, but 8 months later, on the anniversary of my cadstar purchase, Zuken sent me a court summons demanding that I pay them £270 maintenance........I told them that I didn't want any maintenance, and that I didn't use cadstar any more......but the court summons kept coming, and I had to pay cadstar off the £270.
I found out later that Zuken (who administer cadstar) did actually send me a letter offering me to stop the maintenance about two months before my anniversary of purchase.....but I only "skim" read it at the time, as it was from cadstar, so I wasnt interested, and I never dreamed that they would court summons me if I didn't pay the maintenance......I just assumed that if I didn't answer the letter then they'd stop my maintenance.
there was virtually no google or "general forum" type support for cadstar, altium or pulsonix.......for pulsonix I used the sparkfun forum a few times, and some guy called Leon used to answer me and say "its in the manual"......I read the manual, but couldn't do it from that.....I did eventually get the pulsonix pcb done....but it was nowhere near as good as I would have done it in eagle....as I struggled continuously