Rimadyl - Long term use?

[MericoX]

I've been googling, and reading drug information and testimonials about Rimadyl. Kiba was given a week-long trial of it to see if it helps with her knee. She's taken 3 doses so far (she takes it twice a day right now) and my ol' girl is back. From what I can find, the major side effects of this drug are Liver and Kidney problems, as well as GI upset and possible ulceration.

Has anyone heard good/bad things personally about long-term use of Rimadyl?