i'm not a huge fan of the june tailor mats, although they're not bad for the price.
olfa's are good mats but that awful green .... beeeyuck. :lol:
i prefer the Fiskars. they come in such pretty colors. they have a nice, smooth surface; they're easy to read; and much more affordable. the newer ones are greatly improved since the days of the gray mats.
i've never tried any of the others so can't offer a reliable opinion.