I bought these to tidy up my eyebrows and they did the job quickly and efficiently. Definitely recommend and will buy again.
Strong enough to use on face, they did leave skin a bit red for a while but I used last thing at night and redness was completely gone by the next day.
I only use 1/4 of a strip at a time so they will last me ages. I cut in half lengthways first, then cut diagonally across. This makes for a good shape and size for eyebrows and there's nothing wasted as the rest will keep for next time.