Yes the vibration is on at the same time as the heat and the heater is not very strong. Even without both, this is a very comfortable recliner  both for my 5'4" wife and my 5' 10" frame. We find the vibrating massage very relaxing. The upholstery is well done and luxurious compared to most inexpensive recliners.
In assembly, my only difficulty was the two bolts that anchor the back to the seat. I had to use two vice grips/pliers as the space to work with the enclosed allen wrench and regular wrench was too limited. More detailed instructions or looking online for assembly strategies for this joint would have been helpful. Overall, a wonderful and relaxing addition to our home.