I wanted new grips for my 459, and was looking at some expensive custom grips. Some were exotic hardwood from other countries. I didn't want to spend that much, then wait a month or two until I get them, and then find out that I don't like them. Some looked thick and curve around the magazine release. Seemed like it could make the button difficult to press.
A lot of people here on the forum have good things to say about the Uncle Mike's grips. I looked at them and I like that they seemed thin and not curve around the magazine release. I decided to give them a try. It was only $10 for new ones. I'm totally happy with them. I think they are better than the factory grips. I recommend them for anyone looking to upgrade their 459 grips.