It's worth a rental, thats all. The movie was well directed, while the rest was alright. Don't expect Batman, it's a lot more cleaned up.
I would suggest watching it but you wont miss anything if you go DVD instead of Blu-ray (unless it's a dl, in which case why wouldnt you)
ETA only saw Spots reply: I enjoyed it quite a bit and am really honestly looking forward to how they are building the series of movies altogether with connection to being in the same universe. I enjoyed it quite a bit, just won't be watching it more than once or twice (if i have to ) in my life.