The cutting wheel does not touch the tile in the fully down position. The pressure knob leaves permanent scuff marks on the tile. About 1 out of 2-3 tiles will actually cut, and will usually be a poor cut because of all the manual tweaks you have to use to actually get it to cut.
14 ceramic tile cutter Related Question:
How thick of a tile can a tile cutter cut?
Standard ceramic tiles up to 3/8 inch in thickness generally can be cut quite easily with a snap tile cutter.
What kind of cutter do you use for ceramic tile?
A wet saw is a power tool that uses a water-cooled diamond blade to make quick work of cutting tile. The diamond blade does not have teeth, which makes it ideal for more delicate cutting needs. Wet saws can be used indoors, but are recommended for outdoor use.
What size tile cutter should I get?
Standard tile saw sizes will run in the range of 7-10 inches blade diameter. An 7-inch diamond blade on a tile saw typically has a maximum cutting depth of around 2 inches, while a 10-inch blade can increase that by about half an inch to 2.4-2.6 inches.