I have a set of the Twisted Stitch, still haven't mounted them in the Jimmy. They seem super comfy!!! May end up selling them though since I don't have the money I need for a full cage and harnesses. I've had them for about 2 years now (shows ya how long the truck has been sitting

). Anyways, not trying to hock my stuff to ya, just adding my 2 cents for saying they are comfy! I have taken a few trips around the neighborhood with the driver's seat in a temporary mounting position in my botched 'cage (that needs torn out) and the seat was very comfortable. Anyone that has sat in them has always commented that they were quite comfortable! Dunno what you have planned for a back seat but, they make a backseat that matches and is comfy too! (I bought the whole set)
EDIT: I cannot comment on Mastercraft as I have never dealt with them BUT, I can say Twisted Stitch has excellent customer service and is willing to do a good bit of customizing without a ridiculous pricetag! (my front seats are wider and taller than standard (I am 6'3" 275lb) and have two sets of shoulder harness slots (one set for me, one set for my fiancee), my rear bench is wider than standard and has removable headrests (for better rearward visibility when not hauling rear seat passengers))