Short: So far, great skillet and I think I will grow to love it. However, there are caveats. Electric stove owners beware, cooking will take much longer – very long time to heat due to poor surface contact. Also, for the price, it really should include a polyester star for stacking. Additionally, like many other reviewers, I'm concerned that these are produced in China.
Long: I will start by saying that I have a mediocre electric stove with the traditional coils - 5 and 7 inch burners. HATE my stove. The skillet takes a VERY long time to heat up, and the directions included on this site and in the box are inadequately high-level and I think they are using glasstop stoves in their recommendations. Most electric stoves I have seen have 8 inch coil burners at the largest. I think the coil burners combined with the circle ridges on the bottom of these skillets causes a minimal contact issue where heat transfer is far inferior to what I would assume flat glasstops and fire elements would offer. I think the solution for electric burners is to ignore Xtrema’s suggested temps and go a fair bit higher, at least for the initial heating.
Xtrema suggests putting the stove on the lowest setting for one minute (and in another place for "several" minutes), but I left this 10" skillet on a 7" burner on 1 for several minutes and the result was a mildly warm center area of the pan. The paperwork with Xtrema also says to use the 1 or 2 settings for skillets and not go above that, but if I did that something as simple as browning ground beef would literally take hours (took me 45 minutes last night). They also suggest using matching size burners for each piece if you want to cook normal sized dishes (who cooks everything in skills 8” wide or less?) you really don’t have a choice.
Suggestion for Xtrema: If those raised circles on the bottom aren’t structurally critical, eliminate them. Or enlarge their widths, so that us electric coil stovetop owners have better surface contact.