Overall, this set has performed well for me to be able to size my own watch bracelets, whether they are ceramic or stainless steel with friction pins or screws.  Android has a good video on their website about sizing ceramic bracelets, and really helped me to do so.  The blue bracelet block is only good up to a 22mm bracelet, but the gray block works great for anything larger than that.  I have done a bracelet that was 31mm wide and 5mm thick using the gray block with no problem.  The lug pin tool has 2 different ends, which has worked well with steel or silicone bands.  The only thing I have found that could be better is that the hammer handle is only about 1/4" thick and is a little difficult to control being round.  It could use a square or much thicker handle.  Personally, I have epoxied a square piece of wood onto the handle, which has made it much easier to use.  I haven't tried the pry tool or wrench yet, but they feel solid and look capable enough to take off watch case backs.