We are beginning a project to tile the master bathroom. The local tile shop where we are purchasing the tile is recommending a urethane-based grout (specifically Bostik TruColor Pre-Mixed Grout). I am sure there are other brands as well. It is like 4x the cost of traditional grout, but apparently has better characteristics like anti-mold, cracking, fading, etc. There is no need to seal the grout as well.
Does anyone have any experience working with these grouts? Apparently they are newer and have not been around too long, how are they holding up? Is this newer product catching on or is it still too new to tell? I can afford the cost, but is it really worth it?
UPDATE: A few more facts. We are not going to be installing this ourselves for various reasons. We have not yet contacted our installer to see if he has used it, and what his preference is. We will do so and I will report what he recommends as well.