I purchased a percale duvet cover and had an okay experience. Their customer service was helpful, checkout was simple, and shipping was fast. The cover felt fine, this was my first percale set so I wasn't sure what to expect, it felt very crisp. The stitching seemed quality and the buttons felt sewn on well. The color was one of their limited editions, which thankfully was of my preference because their normal colors are a bit boring for me. It washed well and I didn't notice any major wrinkles. The corner ties worked well, too. I gave it a try for a bit but I ended up returning it because the full / queen size was too big for my full size comforter. It had a lot of extra fabric which was bothersome. I might have kept it if they actually had a full size option. It was simple to return, which is also a plus.
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I dislike the limited edition aspect of colors. The full / queen size duvet cover is a terrible fit on a full size comforter. A ton of extra fabric... Would not recommend their full / queen duvet cover if your comforter is full size. Otherwise I'd probably recommend to a friend but I didn't try this long term, so not sure how it holds up over time.