I was just making the change from LP to BW yesterday, completely by coincidence. My first reaction is that the out-of-box experience is poor.
The first step was easy. The account creation and import of legacy data all went pretty well. But after that it wasn't so pretty.
The first hurdle was trying to understand their model for sharing data (so my wife and I can share important credentials). The model that LastPass uses is pretty intuitive to me: it's just a matter of sharing a folder, so relatively transparent. But Bitwarden has a whole separate concept of "organization", and the items being managed don't go in "folders" here, but in "collections". So there are two separate, and subtly different, models in play, and this is confusing. The good news is that the client aggregates the data so when you're using it day-to-day to fill login forms, you don't have to worry about the differences.
Once I'd gotten the data in place, I had to get the clients set up on the various platforms (browser extensions; desktop native, which is actually required for the browser extension's security to work right; phone). The OoB settings were entirely paranoid, and had me re-entering the complex master password over and over, really annoying me. Figuring out how to get to a reasonable balance required figuring out some settings whose labels are misleading. For example, "Unlock with PIN" sounded to me like it was going to add an extra layer of security, but it turns out that it really means "allow unlock using PIN in lieu of master password".
Also, note that while most of the settings default to paranoia-level (like the "require master password every time I inhale", that I mentioned above), you will probably want to change the default crypto cypher. It defaults to PBKDF2, but a better modern approach is the other choice, Argon2id.
...which also reminds me that there's a distinct lack of parity between client platforms. Although you need the desktop native app to manage browser extension security, there's a bunch it can't do. For example, after importing my legacy data, I needed to select all the contents of my LP shared folders and move them to the BW organization collection, but the native app (which seems to be an Electron app, btw) doesn't have a multi-select feature; you need to do that in the online web app.