Sure, it’s definitely not 100% without risk. It’s still the ‘bleeding edge’ in many ways but the tech has improved so much only in the last few years since I have run my node.

As for security I have never heard of a case of users losing funds that didn’t go back to user error in some way, same as with on chain. It’s as secure as you make it.

And for some use cases instant settlement is preferred or even required over onchain which would take ≈10min or more depending on current mempool environment.