This seems to do a good job strengthening nails but I didn't love it as a top coat. It wasn't bad but wasn't any better than another cheap top coat would be, as far as I can tell.  I'll probably mostly use it under polish to keep my nails from breaking. I also wasn't impressed by the "matte" part. Was hoping it would be more obvioulsy matte but it was basically just less shiney than most top coats and wore off somewhat quickly.