The movie has really good actors (even Hillary Swank in a very small role, which might come as a surprise to some, because it really does not have really value to it) and some would compare it to movies like Sunshine Cleaning, Little Miss Sunshine and others. If you like those you'll probably feel that this movie might be something for you.
I actually would like to compare it to the TV Show "Six Feet Under". And if I (and you) do that, than in comparison this lacks quite a bit. The dysfunctional, but still kinda working family thing has worked better there. And almost every episode is better than the movie is as a whole. So if you want good drama, watch Six Feet Under if you haven't already.
The movie itself isn't bad, but a few things just don't work out. Like the relationship between Matthew Perry and his wife. While things are being said and shown, there is nothing to ground those things. On the other hand there are a few scenes that are genuine and very good. Like the "foot" thing. That is very good observation. Or an ad-lib from Matthew Perry, where he's doing the exact same thing his brother did 3 or 4 times. And while it could have been an annoying and plain stupid scene, Matthew elevates it with his choice and adds an extra flavour to it.
Those scenes are few and far between though and cannot entirely save the movie. Still not a complete waste of course