Practicing with a mic, and with ‘hearfones’

What are your thoughts on practicing very regularly with a mic and headphones, as that’s what we use in the studio (so maybe it's best to be really good at knowing how your voice works in that scenario)? Also have you tried practicing with 'hearfones'? They are a headband with plastic cups on the side that allow you to really hear yourself when singing, and supposedly help you to avoid oversinging. Trying to come up with a practice routine that has some days without a mic, some with... Thanks.