For the money, very workable. Installed in a 08 GTI with the matching Megan rear bar. Set front to hard (inner holes) and rear to soft (outer holes). Shifts neutral point of the car back slightly, away from understeer, but far less twitchy than rear bar alone--doubly so if rear bar is set to hard.
Things to know:
-You will need a front end alignment after doing the install, and it's fairly tough. Requires removal of the subframe, which holds the steering rack and lower control arms in place.
-Later MKV and on require a drill to remove the peening of the stock brackets for reuse.
-Bushings are not set up for grease paths, so expect to work on them if you're adding zerks and lines. They will squeak eventually if you do not do this. That said, the bushings can be removed afterwards without much trouble, it's just fiddly.
-The bushings are the wrong shape to fit the OEM brackets. Not a big deal, trim 1-2mm off the flat side so that there's a small amoun of preload on them when the two bracket halves are tightened down to spec.
-If you're anal-retentive, wrap the bar longitudinally with painter's tape during install. The finish is going to get chewed up from trying to wiggle it into position. Or you could stop being precious about your little hatchback and get on with your life.
Basically what you'd expect for the money. Interestingly, the OEM bar on my car was bent slightly, so I'm viewing this along the lines of a very mild upgrade for damaged OEM parts, instead of a proper upgrade.