They suck... I've been to 3 so far. I have access to company box seats at the Rogers Centre in Toronto (Which means 3rd row from the cage).
I've been watching MMA since the beginning and still fail to see how the live events are so popular and here is why:
Good seats are expensive... note I mentioned I don't pay for seats but if I did, ringside for Belfort Jones (which I was at) were north of $500 bucks a piece.
The bigger reason though is you simply can't see shit. If you are close to the cage, you have to see through the wire of the cage and depending on your angle, if the fighters go to the ground you can't see anything. Plus you have the cage posts, the half dozen camera men standing on stools to film down over the edge of the cage that are blocking vision as well. If you are unlucky enough to be lined up behind one of the fighters cornermen, they are standing looking into the base of the cage and can also block line of sight. Then you have the ref circling too.
It's damn hard to see anything from the 3rd row... The 3rd row, literally 25' from the edge of the cage.
Now back up 10 to 20 rows (or more depending on arena size).
Essentially everyone winds up watching the jumbotrons no matter how close they are sitting. Whats the point? I might as well sit at home and watch the fights on my 85" tv. Eventually the UFC will start broadcasting in 4k and it will be even better.