Yes, I discovered that alot of things aren't really eligible for self serve. We went over to use that service last night and luckily discovered the location has extended its hours. They close at 7pm now instead of 5. If we had tried to use the self serve system we would have ended up with over half of our items unmailed.
Our problem wasn't the method of shipping but the size of the label that prints out of the machine. The postage label is enormous, appx. 4x6 so it wouldn't have fit on any of our 5x7 envelopes without completely covering the address. Also, I read something that indicated that this system is only for domestic shipments, so anything being mailed back to Canada or anywhere other than the USA is completely out. I need to check up on this though. What I read seemed to imply that, but I find it kind of hard to believe. I will check into it and post more if I have any luck in deciphering it.
Joy