I bought this cutter to tile our small porch (1x1.5m). The cutter does cut but not as well as ones I've used in the past. Not sure if the blade dulled but it starting chipping tiles badly. To combat I started cutting tiles upside down and it then pretty much struggled to get through much.
Also one of the screws (I assume holding the motor) came loose and jammed it completely.
To summarise it cuts but not impressed with the quality and wouldn't fancy tackling a larger job with it.