As much as it tries to be funny and interesting, it just can't replace Friends, because the fun in the Friends was within them all, and if the "circle" is broken than it's not good. That's the way with the Joey. But, it's not all bad. It has nice plot, Joey off in the "big movie world", but like i said, i liked Joey the most, and only actually in the Friends.
It can be watchable off course. Nice relationships and twists shows in it, and it can keep viewer on. I wish them better luck with every season. It's good for everybody ;)