I just started my carpet buying experience "aka" headache.. I'm moving in the direction of Mohawk Smart strand; from what I've seen and read about it seems to be a great carpet.. I have read some reviews on websites that are good and some are bad. Seems some people are having problems with it staining, ect ect... Have you recently purchased carpet with a stain warranty? what do you think is the best? Any help would be greatly appreciated..