The chair works very well in the tub that we have. One is a standard size tub with shower. The other is a larger sized whirlpool tub.
The chair fits well in both and works extremely well in both.
However, both my wife and I are handycapped. Both of us are very weak in leg, back and arm strength. The chair is not heavy for healthy adults to lift and carry. I can do it but it is extremely difficult. We share the bathroom with our children as they visit. So, we have to remove the chair which only my wife needs. Again, the weight makes it difficult to do.
There is no included device to secure the back once folded for moving. So, the back, once folded will flip around when moving the chair.
An added benefit of this chair is that it can be used when my wife falls, which is frequently. Once I get it to her, she is able to move herself into the seat and lift herself up. I presume, with care, it will work outside and on trips.