I don't have a lot of experience using it tbh... as other than a few transactions with myself I don't have anyone to send/receive with.
Overall I think the business model is excellent. When it is fully 'released' a basic proton account is 'free'... and the user can use an existing email account from another provider to 'log in' to Proton.
Several email addresses can be created and each used individually... so by giving out different email addresses, all with different key paths within the same wallet, it looks like different 'wallets' but it's all the same one just segmented.
It needs coin control but according to Andy that's something they're going to incorporate (they said).