I only use mine when it's really really hot. I want to drink COLD water so I fill it about half to 2/3rds full, inflate the rest, and set it in the freezer horizontally. It lives in the freezer all summer. When I'm ready to ride, I top it off with cold water and set off. Freezing it keeps the water cold for 3-4 hours in 90o heat.

I have the Rogue model - it's long and narrow but really has no room stow a jacket or anything. I suppose you could get a tube and tools into the pouch, but I already have that in the seat bag.

I have never been bothered by the weight,and since it's insulated, I've never noticed any heat (it's frozen, duh!), cold, nor felt any condensation, or experienced any other of the issues that have been mentioned in this thread.

Yes, I have had people make snarky comments -with the assumption that real roadies would never wear such a thing. Like I care? When it's hot, this is my guarantee to have cold water at my disposal. It works for me.

I also wear MTB shoes on my road bikes, and wear my glasses (non-wrap-arounds) INSIDE my helmet straps. Oh, yeah, I have even leave the little visor on my helmet. THe horror!