Pilates Arc/Spine Corrector?

I’m quite tempted to get one. My lower back is still sore from doing too many inversions in May, and I have tight hips. I’ve read these two issues can be improved through use the arc. I also don’t particularly do well (or so I think) in swan dive, and I feel my swimming could be better. Again, I think this apparatus could help me.

What are your thoughts?