This was third type of hydration "device" I have ever bought, and I am finally very happy with my purchase!
I first bought a normal water bottle type belt by the brand "Ultimate" that did not stay in place and jostled around when I ran. I could cinch it really tight to my waist, but not only did I look ridiculous that way, but it was also very uncomfortable and interfered with my breathing.
The second "device" I bought was a handheld water bottle by the brand "Fuel Belt". I had read positive reviews about palm-holders/hand-held bottles and how they feel natural while running. Not quite! Let me tell you how annoying they are on your long runs, when you just want to have relaxed arms, instead of sweaty palms from holding onto the nylon fabric.
I was going to give up and just deal with the hand-held bottle when I saw a full-page ad in my Runner's World magazine about this Nathan Speed 2R waist pack. Searching around online, most retailers were $50, but somehow Amazon was offering it for $25. I figured I'd give it a try - it looked pretty good and all the reviews were positive.
I tried it out for the first time today on a 6-mile run and loved it. It did take a little getting used to in terms of how low I wanted to wear it and how tight I should pull the velcro, but by the middle of my run, everything was comfortable and in place, and I can honestly say I am done shopping for a hydration device for runs.
Some things to know: I am a 5'5" woman and normally wear size 4 bottoms. Another reviewer around my size had mentioned she bought a Medium so I did the same, and I am happy with the size selection. I wound up wearing this belt just below my hip bones and it was very comfortable and didn't move around. It was very easy getting the water bottles out during my run, too (I wore the bottles towards the back and the pouch in front).
The pouch is NOT very useful at all - I fastened my key to the clip, that's all. My cell phone and ID did not feel secure in it, so I wore my Nike arm pouch as well.
If you are looking to carry a lot of liquid, this belt is lacking, with only two small bottles, but other than that, I think it is a fantastic item.