I always keep an eye out, and haven't yet found an alternative to PP. My situation is that I sell a hardware gadget, and run my business from a passive web page. PP lets me create forms that link to their website, so they actually handle the transaction themselves. Most of the other services seem to start with: "Here's a sample of the code that you need to have running on your server."

This liberates me from running a web server, having my own URL, or doing any kind of coding. I love coding, and do it all the time by day, but it would add a layer of complexity to my business that I don't need.

PP has worked fine for me, but they always say that you should have a backup.