Never seen them before, but looking forward to the feedback. JimmyJam introduced me to Propel this summer, which I have been enjoying.

REI sells them in a little plastic tube but they are expensive. As Astro said , I like Propel. You can get it at Walmart and other places and its dirt cheap for a box of single serving (quart) servings. The nunns are tablets.

personally think they are wayyyyy overpriced for salt, and taste horrible too.

I use it but only in very hot and humid weather, the rest of the time it's water only. I believe it helps.

It is not a flavoring for water. Imagine a flat coke with all the sugar and sweetener removed, or Gatorade with no sweetener, and that's what Nuun tastes like...flat and unsweet. I thought it was terrible the first time I tried it because I was expecting a sugary electrolyte replacement, but now I like it. (By the way, flat Coke is becoming a popular fluid replacement at endurance races).

Some flavors are better than others. There is usually a Nuun booth set up at race expos with dozens of flavors that you can sample. I like lemonade and tri berry(?) the best.

I tried em, they were okay I guess, kind of an acquired taste, and quite possible a placebo effect, but I'm sure they do the job just fine. Been eatin those gummy things made by Cliff which I've since found out has caffeine in them, I'll eat em but wasn't looking for a cup o' coffee. I should add, now that I'm watching my sugars and such I'll prolly not continue with the gummys but opt for a more natural source of replacement salts, tomatoes and such.