I really wanted one of these for the longest time. Every time I saw a used one for sale within distance from me I called about it. The last guy i talked to was 70 years old and was selling it because the TU was too slow for him and he bought a ER6.
I finally got a chance to put a few miles on one when my brother showed up with a mint example with less than 1000 miles on it. I really liked the whole vibe. It was comfortable and very easy to ride.. however I'm glad I got the chance to ride one before I bought one, it's just too slow for what I was looking for. I took it on the highway but it barely maintained 63 mph.. which was probably closer to 55mph. It was also extremely light. I mean, it felt like a bicycle, Almost too light.
Too give you an idea of what I thought of it, after riding it a few miles, we had a coffee and turned back around, my brother asked if I wanted to ride it back home, I said no thanks.
I rode it once more after that and my impressions were the same, just not enough get up and go for me. My brother felt the same way and sold it within a few months.