Some would say that as a video game it's an abomination...
I've gotten some limited enjoyment out of it. The controls are fun to use, and the action can be pretty slick once you get used to it. Unfortunately, I don't find the combat or enemy designs particularly enjoyable. It just felt really redundant to me after a few campaigns full of fighting practically nothing but machine gun toting enemies... that was the low point of RE5, and here they've stretched it into an entire game. A lot of people praise the combat and talk about how the j'avo are so well varied with their mutations, but I don't care. They don't mutate enough to keep me interested in fighting them over 3 campaigns.
The level design is generally shitty, linear, and uninteresting, and the game tries to wedge Michael Bay-esque explosion filled QTE sequences wherever possible. Capcom really exceeded their grasp in trying to make a AAA Call of Duty type cinematic action shooter, and it's pretty sad to see segments from other big games shoehorned into this universe. Jake's snowmobile segment feels like it was pulled out of MW2, but without any of the things that made it fun there.
There are some moments of the game that are just abysmal, so bad that not even the defenders who claim that the game is a "misunderstood masterpiece" will defend them. I don't even think it's humanly possible to enjoy wandering around in a blinding snowstorm fetch questing for keys while icy slopes send you to the bottom of the mountain and reverse your progress. Nor do I see any reason that collecting an herb, converting it into a pill, placing the pill in a case, and then tapping a button to eat the pill is a good health system. Yes, there's a shortcut, but it doesn't explain why it was so awful to begin with. It's like they designed this shit to be as tedious as possible.
This was the general reaction most critics and fans had to the game when it released. Some people have really bonded with the action and have praised the game for being a great TPS, and that group has become more vocal over time. But I think they've gone a little too far in the other direction by claiming that the game is some sort of masterpiece. No matter what, it will always be a "me too" AAA cash grab with really awful, boring level design. The combat being great doesn't erase that. You can consider it a heavily flawed game that you might really enjoy.
Just my opinion, come at me with "you were playing it wrong".