I have two hip packs and a Race Face "ripstrip".
The Camelbak one doesn't like being fully loaded, bounces around even when cinched up tight if you run the bladder with any water in it, and the hose is hard to access; if it comes loose it dangles and gets caught in the frame etc.
The Source pack solved all those problems, it's much tighter profile and hugs into the small of the back nicely, if you've loaded it, you can actually but these small shoulder straps on and route the drinking cable like you would a backpack, but without all the heat of running a backpack. Alternatively, it's storage compartment works beautifully even without the bladder in it, and sits very close to the body and doesn't move. As far as doing everything I want it to, the Source hits the nail on the head.
Once in cooler weather again, and just a bottle on the bike being enough hydration wise, Ripstip is fantastic. It's really low profile and sits under my jersey when in use, kind of just acts like a SWAT bib would, but with any item of clothing. It'll fit my usual ride stuff, multi-tool (for when I'm on the Canyon, as my Honzo and Stumpy both have SWAT tools), pump, derailleur hanger, 60mL sealant, phone, keys, and a small tyre lever/patch kit into it no worries (my CO2's and tubes are usually strapped to the frame)..it's main advantage being that you're not wearing a bumbag.