I actually am not the biggest fan of the first few seasons. It was an interesting and was a novel concept, but the production quality was a little amateur. Unlike most, I liked Debra for most of the series..but she was hard to watch that first year.

S3 was ok
S4 was epic. One scene in it is probably top 10 ever for me
S5 with Stiles was fine IMO
S6-7 were forgettable but watchable if I recall. Good cliffhangers at least.
S8 was pretty bad and the finale is, of course, terrible

I will say I miss Masuka...so many LOL moments. One of my favorite secondary characters of all time.

Overall, I'd say watch it...