Does it vibrate? No. Reverie is the only CERĒ tool that doesn't, and that's deliberate. It works through position, not sensation.
What is the vaginal angle and why does it matter? The vagina sits at an angle rather than straight up and down, and that angle is steeper when you're younger. Collagen loss changes it over time, the same process you notice in your face, and childbirth can flatten it further. A flatter angle is a common and rarely-discussed reason sensation changes with age. Worn rectally, Reverie tilts the vaginal canal steeper by proximity, which is the whole idea behind it. No surgery, no recovery, nothing permanent.
Can I use it with a partner? Yes, and it's designed to be worn during penetrative sex.
Is it safe? The flared base is there so it can't travel. Use plenty of lubricant, go slowly, and stop if anything hurts.