the rubber mounts dont so much fail as start to turn inside out which mucks up the careful distance between the shock and lower ball joint with wheels off the ground, with car jacked up you can lift the wheel and shock up and down, put new ones in and you cant even tho it is still all just hanging their untill the top big washer thing let it drop through the hole.
They are all a bit different on the VW audi range and all of them are crap and need replacing far to often.
The bearing surprisingly as they are fairly small I have never seen fail and this isn't the problem with them.
its as i say the rubber turning inside out and or on some of them tearing away from the metal as on the mk1 and 2 golfs, they then ditched the metal and just used rubber that fits into a dome on the body which is cheaper to replace.
they are a high wear item and you just need to replace them when they wear its fairly easy.
I have heard of them wearing out in as little as 6 months tho

We have a VR6 in at work thats had them done twice in 2 years for wofs.
golfboy do fit the motorsport034 ones, they are better.
comfort wise they should be fine , VW would say their ones are soft for comfort, and i guess they would be right.