For a paperback copy of my manuscript, I ordered through Lulu.com. The quality of the cover print quality was good, but there were some print lines on the front illustration. For the final draft, I ordered a paperback copy from CreateSpace, which is owned by Amazon and provides the paperbacks that are ordered through the Amazon Order Page.
I tried out the matte version of the cover, but think I prefer the glossy finish, so all paperback versions will be glossy.
Glossy vs Matte