The GOTY edition (with all the DLC) is $7.49.yes, for 4.99, are you kidding me? of course its worth it. and the DLC makes it better
I just played through it for the first time a few weeks ago, having picked it up during the summer sale. I enjoyed it quite a bit. I'm sure it's even better co-op.
All the classes can end up fucking brutal, Siren especially. Hunter not all that great unless you're good with headshots or have that shield ignoring power. This is assuming scaling with playthrough 2.5 as it's been dubbed.