I use nuun daily and appreciate the added flavor and electrolytes it gives to water without adding calories.

Wanted to love these for their uber-convenience while backpacking and for the reasons every other reviewer seems to love them, but I just didn't. Something about the taste didn't sit right with me, and unfortunately it was the only thing I brought along, so I drank water for the whole backpacking trip, and my buddies didn't want them either. I'll give it four stars, as is seems to do what it's supposed to do, I just didn't care for the taste.

love this stuff! i use it on a daily basis, as a treat at the end of my hike, during my bike rides, or just something to break up the monotony of drinking water all day. i especially love it when traveling or on an extended trip. traveling, i keep the tabs in my bag so that i can fill up my nalgene on the other side of security and drop some tabs to mask any funky tastes from the local water. backpacking, these tabs are so much lighter to carry than sugary mixes. plus the tubes keep the tabs from getting all messed up, no matter how long they're in my pack. only flavor i haven't tried is lemon tea. my three favorites are lemon+lime, fruit punch, and tri-berry.

I have a real issue with sodium depletion, and between these and the Margarita shot bloks can keep my levels up on long rides. I like the convenience, and I go for grape, orange and Lemon lime with no complaints about taste. A nice no calorie hydration option.

Have used these on 3+ hour bike rides. I'm not a fan of mixing up gatorade, but these have done the trick when it starts getting hard to keep pumping water. Enjoyed the Lemon/Lime a lot. Subdued taste, not too sugary or salty, no funny aftertaste. Tried the Kona Cola as well and didn't like so much. Four stars because it did the job, but not something I'd care to spend too much on.