Run hydration belts, thoughts, experiences, recommendations?

I started out with a belt that had 4 small bottles. It was ok, but didn't carry a lot of fluid. And I often dropped them when trying to put them back into the elastic holsters. The velcro has worn out and doesn't stay attached anymore, so in the middle of my runs it would just rip apart and fall off. I've since gotten an ultimate direction vest which has room for a bladder in back, 2 bottles in front if you want on the shoulder straps, and I'm happy as a clam. It doesn't bounce around, it fits nice and snug, there's plenty of room for fuel/phone, etc. I always wear it now out of habit.

For quite a while I used a Camelbak waist belt that held one full sized bottle. I was never thrilled with the bounce but it was tolerable. As my long runs started geting regularly longer I switched to a Nathan hydration pack and I love it. As mentioned above, the water stays cooler longer and there is plenty of room for nutrition, phone, car key etc. The bladder holds 2 liters and there are front pockets if I want to add a couple flask sized bottles.

I have a Nathans (trail ?) belt.  it's ok.  I really don't like carrying anything in my hands when I run.  The bottles are small.  The one I have holds two 10 oz.  It will get me through a 10-13 mile run unless it's really hot out.  It bounces around some.  If I have it tight on my waist it's manageable.  Biggest gripe is full bottles leak.  Maybe a 2/3's full bottle will not.  If I start the run with full bottles my shorts will get pretty wet in the back. 
Never tried the backpacks but friends who use them typically like them a lot. 

Yep!
here's a link to the product page:  https://ultimatedirection.com/sj-ultra-vest-2-0/

Seriously, I almost feel naked running without it now. There's no way I could have done my long runs in the past year without it, especially in the brutal heat. I keep pain killers, inhaler, extra chocolate, pepper spray depending on where I'm going, plenty of water so I can go way out into the middle of nowhere. 

lol, it's a little hard to determine if the vest makes me too hot because when you run in Texas, you're hot no matter what you're wearing. Actually I always fill it with ice cubes and the skin on my back goes numb.

ETA- I also used to run with a camelback, 70 oz i think,  but I traded up because even 70 oz wasn't enough. The added ability to carry 2 bottles on the shoulder straps in front is the best thing about it.