I used to hate this show mostly due to me disliking virtually everything else Disney Channel has to offer. Now I kind of enjoy it.
For the bad things I'll admit, objectively, the show is extremely cliche. Particularly when it tries to do "edgy" things like breaking the fourth wall etc. it comes off as extremely forced. The plots are repetitive (and acknowledging it doesn't make it better, just lazy). It goes the route of having diverse types of families (divorced, step, interracial etc.) which isn't bad but can be some what cridge worthy in the presentation (particularly the mexican-jewish celebration and the fact that Doof's ex-wife still comes to his family reunions bother me). The show also makes light of bullies through buford basically getting away with the abuse he gives them (especially Baljeet).
Amoung the good things, the songs (as someone mentioned earlier) are hit or miss but I'd like to say they "hit" more than miss by at least being catchy. My personal favorite is "(S.I.M.P)Squirrels in my pants". I like the idea of having a female character endure slap-stick antics for once. I like that the show mantains some continuity despite being a comedy. Not really much to say beyond it's arguably the best show on disney channel.