I tried migrating from LP to BW and got import errors. Bitwarden's error message was very vague (along the lines of "sorry, something went wrong") and I haven't been able to track down what entries were causing the issue. I've tried 3 or 4 times including trying to reproduce with subsets of the full collection but it's too much of a pain with hundreds of accounts and I so far haven't been motivated enough to manually transfer them or to write a selenium script to do it automatically.