Here are Silverneedle's ratings and reviews. These ratings are useful because Silverneedle has his/her own standard and will rate and review the ping pong equipment accordingly, giving you accurate and useful ratings and reviews to aid you in your next online purchase.
Tried 1.5 and 1.8 as BH rubber on 729 f1 blade. It is fragile top sheet, sponge is resilient though on the plus side that makes it light weight. Its very predictable even when 6 months old, good for pushes, chops, and topspin loops, blocks, especialy good at flicks.
In 1.8mm it is also good at punch blocks and smashes too, in 1.5 it takes a bit too much effort. 1.8 alows play a bit further away from table but still very good at chops and good controll. throw is lowish esp 1.5mm sponge version. No choice of sponge hardness in 1.5 and 1.8mm. Have had loads of sheets and always perform the same so very good QC. If you clean it regularly it can generate good spin. I expect to keep this setup for another year or two at least.