I like those girths, because my TB is very girthy and goes well with the fleece girth cover I own.
I use a fleece girth cover, but the only pain in the patooie about it - is that it does not stay in place and bulks or wrinkles up, causing pinching.
I want one of those fleece built in girths myself, but they don't make them in back *not the fleece, but the girth itself* and I ride in only black tack.
You can find them much cheaper than that, there are people who sell them used quite often. Keep looking.