Decent watch, probably won't watch it again, but can recommend.
I'll be upfront, while it's not really for me, I think most people will enjoy this movie, if for nothing else, then the idiot banter.
Franco's a good actor, but sometimes he and Seth put too much of themselves in the movie, and it gets worse when they're together on screen. This basically looks like they just took what they do hanging out on a Friday sometimes and put it on screen in places, basically anytime the action dies down and they start to lean into the lull.
The first story that gets interrupted by the main plot, could easily have it's own movie, romantic comedy or drama: an older man, legitimately and legally dating a high school girl has a LOT of situations to it, and has amazing potential. Once it gets interrupted by the "on the lamb" trope, I would have honestly thought it would disappear as it would in most movies, or at worst, she would show up looking for him or to get something from his place and get abducted.
The re-return to the original story line is almost funny enough itself in concept, but in actuality I just end up waiting to get back to the movie, and they do things like that throughout the entire movie.
It is conceivable when things are happening to the main characters that derail them, but when they're actively derailing themselves, then it just gets sad. You start to question things that you shouldn't, and it's not even because they're high, as they directly have a conversation about how the weed is really bad for them, given everything that is happening.
I'm not a fan of drug humor, or abuse humor (usually), and everything that isn't that is so ridiculous that it's hard to like.
There are good jokes woven in here, but a lot of this is "I wanted to make a movie with my buddy while we act like idiots", and as a fan of Kevin Smith, I respect that, but that should put you in the frame of mind that this isn't a top tier movie, and Kevin Smith writes better dialogue.