A review for Circle stickers by Tom Olick.
Stickers are ridiculously hard to peel (you need long fingernails!).
A common split-back is the easy solution - I have no idea why this is not supported.
CS is also very difficult. Only 30 seconds after I submitted my proof, the agent would not allow me to make a minor change, saying the workflow had "already started". Since it took 4 days to ship the stickers, this is not in the realm of possibility.
I'd order more if they fixed these practices.