Summary: I've had a Brother PT-110 for over 12 years. It still works fine with the tapes mentioned in the Cons section. The PT-80 only works with the supplied sample tape and 17 months old M-921 tapes.
Pros: Cheap, works as advertised with newer tapes.
Cons: Does not work with M-921 and M-721 tapes over 4 years old. Possibly older tapes in general.
Summary: A very good labeler I received for free when I bought my HDD. Unusual combination, but it makes sense I suppose. Thanks newegg!
Pros: I've used this labeler for about a year now at work and it's really great. Easy to use, and letters are very clear.
Cons: Leaves about 1/4" on each end of the tape when you print something. May not seem like a big deal, but the tape itself costs almost the price(or more if there's a sale) of this thing. As I said, the tape is expensive.