I was skeptical, but I'm glad I tried them. They look amazing and are super comfortable. I normally run more medium than large, but went for a large. They fit very well. A little tight in some places, but not uncomfortable. Not at all see through and no issue with panty lines.
I highly recommend them. As a bonus, my dog's fur barely sticks to these and comes out easily and he has white fur so it would be very noticeable.