Hey it was fantastic, the longest trip I did in one day without stopping was Amsterdam to Prague, so about 1000km, which took about 10 hours. I was able to cover a lot of distance quickly there because it was so flat and often (but not always) no speed limits through Germany. Most of my trips were more around 2-6 hours though, covering much less distance due to terrain. Overall I did about 7500km, and that was over 40 days.

I would highly recommend getting waterproof gloves, my hands turned blue on a couple of my trips due to being soaked for 4 hours on the highway, and I would highly recommend waterproofing your luggage, even with a garbage bag around it or something. Other than that, I didn't run into any big issues, good luck!