People either love it or hate it.
I never was ok w/taking extra shots every day especially when I was pumping so I ended up giving it up without getting a good feel for it. It just wasn't convenient when going out and having to carry syringes/vials when I was used to just having the pump.
The nausea thing is true...everyone I talked to experienced it too. And at first it takes some early leg work to figure out your dosage. You'll probably get a few wicked lows in the process.
The thing with Symlin is that it's best suited for people who have pretty tight management with a good A1c b/c it allows them to go that extra step and drop their A1c's a bit further. If you have battle lows Symlin will exacerbate the issue. If your A1c is still a few points higher than you'd like Symlin isn't going to magically fix that. It'll shave off a few decimal points, but you wont see a huge drop b/c you got your post-meal numbers in check.
Definitely talk to your endo though. My only other advice with post-peal highs is take your insulin 10-20 minutes before meals if you don't already. That will allow enough time to let the insulin to get into the blood stream to correspond to when you 1st put food in your mouth. That small change worked wonders for my postprandial numbers.