The Disaster Artist isn't good. It is great.
The film does more than simply play on already-established heartstrings of The Room cult following. Sure, the scene recreations and James Franco's larger-than-life (but certainly not exaggerated) depiction of Tommy Wiseau is what fans of The Room were craving from The Disaster Artist. It delivered in that department, but it went above and beyond what one could expect from a film about "the greatest worst movie ever made".
Compare it to last year's La La Land. In a sense, both films are the same—they follow young, eager actors hoping to make it big in Hollywood. But The Disaster Artist strips it down: take away the glamour, the love, the music, the sparkle, and you're left with a story that doesn't really have a happy ending. Or maybe it does.
The film is funny, yet it doesn't poke too much fun. All in all, the film is perfect. It's a perfect comedy and a perfect take on pop culture. And perfection is not easy to come by.
Read Forbes's take on the film here.