Caught this with the wife yesterday. Incredibly fun movie, and worth watching on IMAX. Vin Diesel seemed to be channelling his inner Stallone for a good part of it (slurring words, massive fistfights) and it offered closure to a number of characters from 2 Fast 2 Furious and Tokyo Drift, but still left the door wide open for a sequel.
I thought it was pretty tight. The insane plot with every popping up to say hi to Ollie was a nice bit of comedy as was Dig rescuing Felicity. I said early on that the Ollie/Laurel relationship would end with a meh feeling once Tommy got involved.