Yes, but likely only when I'm very reliant on it. As it is, it's very ad hoc and buggy.
To be frank, I spend 90+% of my time in KMyMoney. I need Ledger only for its virtual transaction features (for budgeting). The other use case I have for ledger is to perform some analyses/reports in it that KMyMoney doesn't provide.
There's nothing "smart" about it. It's simply a script that takes in a kmy file and creates a valid Ledger file. It's been a while since I looked at it, but at the moment I doubt it handles things like stocks and commodities, etc.
Still, I'd rather use KMyMoney to enter transactions than using the Emacs mode for Ledger.