The D-pad and the start/select silicone pads are great. They feel good, don't move and are reactive.
However, the A and B pads aren't tall enough. The buttons both move freely and rattle. They work well enough, but feel awful.
I have replaced the A and B pads with the grey ones that came with my GBA which still work fine. These were mostly purchased for the stop/start buttons, so not a big loss personally

The clear silicone button pads look great but the issue is the D-PAD silicone button pads. It fits in place but is a bit too stiff. The left side of the silicone button pad is too stiff so I have to hard press it. This makes me want to go back to the OEM pads. All the other pads work perfectly though!

The pads are too mushy and does not provide a tactile response when pressing the button down.

Worked with OEM shell and new shells.

Game Boy Advance Prestige Silicone Buttons

I've read a lot of guides that suggest that you should stick with OEM pads if possible. That might be true if your pads are in good shape. The ones I had were mushy and terrible. These pads were a huge improvement. Very happy with them.