Couple years ago, started with lulu.com. Formatting was challenging; the first print edition was 600 pages cuz I struggled with getting rid of the double space. Second edition much better. Overall, bad experience though. Initially, many friends said they bought the book but when I checked the numbers for royalty purposes, they in know way reflected the amount of feedback. Then, for some unknown reason, my account got locked out. It literally said it had been deactivated. At the time, lulu had no customer support other than an email address. Nobody to call, no reply on repeated emails. I don't think I ever received a royalty check, which would have been paltry at best.
I then moved on to createspace.com. Overall, it was easy to use, easy to do multi formats and then distribute directly on amazon. My only problem has been that I've had people purchase, literally show me the hard copy, and then I check the sales figures and don't see anything.
So big piece of advice when you're at this stage. Do a controlled roll out and test to make sure the sales figures reflect the actual sales. Like, keep it all hush hush, sit down with your SO and other testers, have them buy a copy, and check the #'s. Do it again and again.