I have Eibach Sportlines with Bilstein Sprint shocks on my GTI and can also say that the rear end does sit higher than the front. I also replaced a fair amount of bushings while upgrading springs and shocks so I can only speak for the operation as a whole but the chassis does feel very solid and it does ride alright too despite the Bilsteins. The controlled rebound with the Bilsteins in higher speeds is just lovely though...
I am not totally convinced with the Eibach springs however as they don't give the stance I wanted to and I feel they are causing a little bit of flightyness at the rear end that my car didn't have with the stock setup. Of course I can't say whether it is the springs or shocks that is causing this as I changed them at the same time. Nonetheless, I already have acquired a set of H&R springs and will soon be swapping my Sportlines for the H&R's so I can then report how the lowering and handling is between the springs with the same Bilstein shock!
Here's a pic of my car how it stands with the Sportlines: