I recently purchased the Epic Bike Short Liner and have ridden in them only once, so these are just my initial thoughts. I know that Mons Royale did some adjusting of their sizing and that worked great for me. Previous Mons Royale shorts I own I had to get in a XL, but my new Epics are a size L and fit great. Fabric is super comfortable and noticeably less stinky after a long ride than synthetic shorts. Looking forward to many more rides in them.
Great liners! Super comfortable, super breathable. But butt cheeks have never been happier on long rides.
These are excellent quality, however they are not the cheapest, so if you see them on sale get a pair. Alternatively, there isn't much difference between these and the cheaper Royal Chamois Shorts, which I actually prefer.