Strongly leaning towards an MTI undermount tub in our new build. No bubbles/jets/circulating water - just the tub.

There is a “Thermal Therapy” option which heats the tub itself (mainly along the back) but not the water itself (so wouldn’t in itself help keep the water warm longer, but you would have more heat at your back).

It’s a pricey add-on - wondering about the experience of anyone else who has this option w/o the jets and bubbles. Noticeable difference? Worth it?

Thanks.