YouTuber Scott K is one of the first people to get his hands on the new Roli BLOCKS. Unfortunately he immediately ran into some issues with the light pad's sensitivity; seemingly ignoring his hits altogether. Scott documented his issues in this video. There were some reports of problems with Roli's Seaboard when that first came out too. Reader Carole let me know about her ordeals with a defective unit, which was replaced by Roli with a second defective unit. They kept at it; shipping units back and forth until they got her squared away though. Their QA may be shit, but at least they have some truly resolute support.
I recently purchased a Roli Lightpad Block and ran into some issues playing drum racks in Ableton Live 9.7. Even with Ableton Live closed, the bright flash that indicates a group/pad is "triggered" doesn't go off ~30% of the time I touch it.