Crocs don't have the best reputation for being stylish. However the company has been coming out with a lot of very cute styles, including this one (the Huarache).
These crocs are completely waterproof, so there is no need to bring along a pair of flip flops for the not-so-clean hostel showers. Just be careful not to slip (see the con about being slippery on wet surfaces).
There are 11 different colors to pick from. There are more subtle ones like pure black and two tone brown, and lots of really fun and bright combinations.
The slip on style is great for quickly kicking off your shoes and easily putting them back on, without having to bend over (which can be a challenge while wearing a heavy pack).
Because there is no way to adjust the straps, these shoes are better suited for a dry walk on paved/groomed surfaces. They don't provide enough support for walking on trails.
These shoes are better suited for average-wide feet. Those with narrow feet may find they slip around in the shoe, or walk out of them (there is no way to adjust the straps).
The sandal is so supportive and comfortable that many people with PF claim it helps immensely with their discomfort, even when walking all day long with a pack.
There are thin grooves on the insole that very quickly collect dirt. They are easy to clean out, but it doesn't look pleasant. Purchasing a color that has a darker insole will help hide the dirt.
They have good arch support with a very well padded heel. The straps are covered with a soft fabric where it touches your foot, helping to prevent rubs/blisters.
The sandal runs fairly long, so you'll want to consider going down a half size or size in order to get the proper length. However if you have wider feet, this may mean the straps won't fit properly.
Fashion often goes out the window when it comes to packing for a backpacking trip. However these sandals, while comfortable enough for long days on your feet, also look very classy.