Not Bad, But...
He's not all that bad a reviewer, and for the most part, his videos are
pretty entertaining. The "but" comes in when he finds a joke he likes, and won't stop making it.
For example- when Avatar
came out, he did a Bum Review of it, occasionally comparing it to...all the movies similar to it. Fair enough, pretty funny. Then another reference to it in one of his Nostalgia Critic reviews. Then, when Video Game Confessions: Duke Nukem came out, the entire video
was a means to take another shot at the movie.
Even within individual episodes, this can be a problem. For a more recent one, take Bum Reviews: Red Riding Hood. Yes, the movie looks a whole hell of a lot like Twilight, but that doesn't mean we need 4 jokes in a 5 minute video comparing this to it. One in the title sequence, one right after it's over, two more in the actual video.
At times, the running gags get a bit annoying as well. Things like Chuck Norris, Bison's Of Course, Casper's Timing, all those things— get pretty irritating when there's at least one in almost all his Nostalgia Critic reviews.
The other problems are pretty minor- his acting gets iffy at times, sometimes in tandem with annoying voices, and 20 minutes can be a bit long for a review, but on the whole, he's decent. For all I don't like about the running gags, so long as you don't watch too many reviews in a row, you probably won't notice it. 7/10.