I've been using Volumer++ on my Nexus One for a few months and it's never let me down. It's simple to select the app and load one of two user configured presets and be done with it. I use mine for night with only phone and alarm on and day with everything max. It's also nice to have all the volume controls on one page which is lacking on the stock Android. The only thing I wish this app had was a time schedule for auto selecting the presets. Such as 630am to turn on Day setting and 11pm to turn on Night setting without me having to click any buttons at all.