Uncanny how posts come up for jobs I've either just done, or am about to do.
Apropos the Removing Floor Tiles thread, I started removing the ones in the bathroom today.
PMF180 multi tool, fitted with an old blade ground down to act as a power scraper - works pretty well.
Certain knack to it, getting the right angle. Also, you have to keep it moving because the friction generates a surprising amount of heat, which softens the tile & makes it harder to remove.