Extremely fun for a short term go (3-6 days) but after a while the bosses start 1 hitting you and you need like level 200 hp for level 150 boss.
Also after like 2 days of running the powers glitch out and the cd on them gets really messed up, like hero powers on a 25 second cooldown (the timer just goes really fast) while still getting 30 seconds of super powered heros