A lot of people seem to do this, so I'm curious - what are the advantages compared to e.g. LastPass? Also, how well does it hold up if you used two devices simultaneously?

KeePass writes out a lock file, so the other instances will warn you and you can tell them to open the database as read-only.

Advantages? I guess I should try out LastPass. Free or $1/month premium is a good price.

Cool. I always saw this as a limitation but honestly it's very, very rare that I need simultaneous write - just simultaneous read. I will start recommending KeePass + Dropbox to those who don't trust LastPass. What's KeePass's browser integration like?