I've been wearing Exofficio underwear for years and they are so good that my drawer is now almost exclusively Exofficio Give N'Go. I wear these everyday, particularly in warm weather and always for vacations. I have mostly boy cut briefs, but also bikini and lacy thong. While they are more pricey than some undies, they hold up well and last for a long time. I am a size 16 in pants (7-8 undies) and the XL fits well.  The XXL are actually too big.

PROS:
*Comfortable
*Moisture Wicking & Breathable
*Super fast drying (especially if you roll them up in a towel before hanging)
*Durable
*Boy cut brief shows very little panty-line
*Easy to clean
*Boy cut briefs stay in place

CONS:
*White--On both a Cambodian trip when clothes were washed by a local service and in my low water HE Miele washer, white absorbs surrounding colors. Because I use these so often, the whites will inevitably find their way into a mixed wash without a color absorber.  The only time they look white is when they are new. I don't bother with white anymore.
*Pads & panty liners--don't stay attached very well because the surface is a bit too smooth for the adhesive. It's not that they are unusable, but some shifting may occur.

I would recommend these to anyone traveling or looking for breathable, comfortable underwear.