First off, the quality of the materials used for this product are excellent.  The quality of the construction is excellent.  And the quality of the design is fabulous.
Fit & wear - if you have never worn a g-string before you may experience some adjustment, both physically and mentally.  For me, the first couple of days were uncomfortable. But after I got accustomed to the feel of the string rubbing where the sun don't shine, it's as if I am wearing nothing at all.  Which is nice! Don't wear the waistband too high; doing so tends to press the string too tightly against the skin resulting in a wedgie.
The best part is the pouch.  Plenty of room for the twig and berries to hang out with a nice supportive lift that prevents any discomfort.
Unlike briefs, boxers, boxer-briefs, etc. there is no bunching, binding, pinching, or riding up your crack with these underwear.  These are by far the most comfortable underwear I have ever worn.  I plan to buy more and wear them every day.