Nice find. Ironically, I just got the same keyboard on craigslist two days ago. As a person who owns a 55g 87U, 45g 86U, 45g 104UB-DK, and a printed 45g FC660, I found the Topre Type Heaven to be much better than I expected. I thought the case would be cheap, but it's quite sturdy. The feet are also good as well (very similar to a Realforce). The switches feel quite similar to a printed FC660C with the exception of being slightly more top heavy. I also noticed that the the keys sounded a bit louder than my FC660C in that it produced a higher pitch that covered-up some of the thud sounds when bottoming out. The sounds and feelings are still pretty decent regardless, so you shouldn't be missing out on the thock experience.
The ABS keycaps, however, felt odd to me at first. The Topre Type Heaven's keycaps felt a bit dusty, especially on the mods. It might be because of the way the keycaps are coated or textured. The keycaps also rattled more (in terms of sound) than PBT caps when simply touching them without depressing. I did get used to the keycaps after a day of use, but I'm not sure if the same can be said for others who get the keyboard. Also, if you put any cleaning solution on the keyboard, like say rubbing alcohol, the surface of the keys and case will look like they were stained with water. You can get rid of most of the stain patterns with a microfiber cloth and/or some water, but this is still a bit of an annoyance for me considering I like to clean my keyboards after a day's use.
