I am new to trail running and wanted to have something I could carry water in on my longer runs. This belt has been a lifesaver, for me and my dog. The water bottle holds plenty of water for myself, my dog, and even my husband. I'm not looking to drink a ton, just get my mouth wet and this is perfect. The bottle doesn't bounce because of the elastic that secures around the top of the water bottle cap. The angled shape also conforms to your body so it doesn't dig in.
The flap is secured by strong velcro and I usually just slide my phone in there. (It has fallen out when I don't make sure the velcro is securely tightened so be warned.) I doubt this is its intened purpose but it's the only place I can fit my phone and it does the job. I have the iPhone xs and it holds it fairly securely. I wish instead of an open velcro flap, it was a zippered pouch. When you lift up the flap, there is a small zippered pouch that is big enough to hold my car key and maybe a small snack. I don't access it often though because my phone is being held by the velcro.
The belt is a tad stiff but I don't mind that because it keeps everything from bouncing around. It's easy to adjust the length which is nice in case my husband wants to wear it when he goes out. As it is not the women's belt, I feel like it might fit him a little bit better than me since he has narrow hips and it rides up a little on me. Still works well though!