Is this show perfect? No. Is it funny? Absolutely. Gethard plays his character very convincingly depicting a genuinely misguided but well- intending friend that isn't always the blunt-end of the joke. Parnell balances a semi-self-aware slacker with enough common sense to coast through life. Horatio Sanz perfectly combines dumb and funny while avoiding painfully stupid and annoyance. Dylan Blue's character is a vector for the style of comedy that utilizes unexpected responses and juxtaposition of age/lifestyles which he delivers with full efficacy. The rest of the cast does equally well in portraying their characters and filling their roles but with less screen time.
Critiques of the plot are misplaced as the show's intention is not to tell a great story but instead to use the plot to drive forward situational comedy. As such the show's intention is dead-on. There's seldom a minute that passes without a joke and most of them fly. This type of comedy relies on a laugh track so there's no awkward silence after deliveries that may not work.
I've watched the series multiple times and it is worth the time. It's easy to critique and therefore will lead some people to never have a chance to enjoy but the appreciation is more subtle as the humour jumps around in style.