I've had several DH's on Polaris service. It greatly depends on the FA crew. Most of the FA's do not like it. It's a lot more work for them. If the A is ok with it and puts in some effort, it's a pretty good experience.

However, if it's one of these crews that hide after the 1st service and don't do much anyway, it's no better. We have a lot of very senior FA's that are very set in their ways (unlike me) and do not like change. Change that requires more work is even worse.