These were originally 100+ to start with so they are "cheap" per say so I think if you are just looking for something easy to use that you don't have to be super tech savvy then these would work just fine.
I did end up getting one of these-I just called the store it said it was available at and went in and bought it. I didn't get the $10 off but for $30 I still can't complain because I have really wanted one so the $30 is still a deal.
soupbean is correct. The only prices they will match are set in stone prices so like the price of a tv or if the toy says it's 4.99 they will match the 4.99 but they won't match if the toy in the ad just says so much percent off.
I prefer to use this tool on dry feet you just have to follow the directions-after so many swipes you are supposed to stop and feel and make sure you haven't gotten to soft skin or else you will bleed!