I do. Quite often, actually. Seriously the best way to share albums if both parties are on iOS. The only downside is it can definitely take up space as the device stores a copy of each image from each stream.

Photostream is really the end game for what sharing photos should be. You serve it on space that you rent privately from Apple. You have comments, likes, and filters. You can post photos of any size. Your social network is not being analyzed because Apple is selling you the space (iCloud) and the device (iPhone).