I've used a variety of REI tents over the past four decades. On the whole they are good, reliable tents. The REI tent designers tend not to stray into cutting-edge designs, but let other makers experiment with new materials and designs. Then one or two seasons later they sort through the innovations that proved out and incorporate them. This strategy works well for them and I've been happy with the REI tents I've owned.

Most all "three-season" trekking tents that are double-walled (inner tent + rain fly) have large areas of mesh. Warmth is not a priority for such tents compared to weight and the ability to shed rain (not snow) and withstand moderate wind. If warmth is a high priority, look at a "four season" or "mountaineering" tent.