My dad travels roughly 60% of the year nowadays and the CSR is definitely worth it for him; he made his money back in his first 2 weeks of owning it.
The AMEX is nice, but the second they start charging me the $450 annual fee, I'm out. Some of the perks are nice, but I don't get to use them often enough. I've been turned away from a Delta lounge despite booking the Delta flight with an AMEX; the concierge is nice but I've only used that service once; book travel with them and it's the same as kayak.com plus a $30(?) fee; the rewards program is crap (my Discover card I pay $0 is arguably my best); the Priority Pass lounges you generally have to have a flight in that terminal to make it work; if I was paying for it, so far, I'd be disappointed in the AMEX Platinum.