I've heard a lot about this comic and have wanted to read it for some time. I was finally able to borrow a copy and it's....ok.
The story takes place 15 years after Splinter and all but one of the turtles have been killed. The remaining brother (who I won't spoil for anyone who hasn't read this) is revealed at the end of issue #1 and isn't who you'd think it would be.
Anyway, he teams up with an older April and her daughter to take down the grandson of Shredder and end the long standing feud between their clans once and for all.
It's in essence, "The Dark Knight" for turtles fans.
Now I didn't find this comic bad at all, I did find in uninspired. Way overrated considering all the praise I've heard heaped upon it. Turtles fans will probably love it, but my favorite "ending" to the turtles was when Eric Larson got the rights and finished off the regular series.
But that's just me. If you're curious, go on and check it out. Like I said, it's not bad.