I'm a building professional, but not a tradesman, so I know a lot stuff in theory, but I haven't a ton of skill. I had to retile some of the kitchen backsplash, which is a glazed white subway tile (by the previous Owner). I have the 4.5" cutting blade. I bought it specifically to cut odd shapes of tile to conform to the irregular perimeter conditions of the wall. At least for these thin-ish glazed ceramic tile, it cut the tiles like butter. With care and observation, I think understand how to minimize chipping of the glaze (there was very little, but I did cut several tiles over again to get them really nice; thank goodness this tile is cheap and very available at Lowe's). With more practice I think I can actually avoid chipping altogether. I am very happy with the cuts I was able to achieve. I was able to make pretty square corner shapes to contour around countertops for example, thanks to the ease by which this blade was able to cut the tile. This was a fairly finite job, so I can't comment as to how long this blade will last, but it was definitely worth the purchase price in getting this project done!