Hi ... I'm brandy new to this forum. I live in RI and I've owned an in-ground pool for 4 years ... that is my experience. So it is rather limited. However, I'll share my thoughts ...
I believe it is more important to choose the right vendor more so than the pool material. When we were considering a pool, we looked at Gunite, Cement/vinyl and Steel/vinyl. Our neighbor has a gunite pool, so we were able to leverage their experiences.
5 years ago, the cost in our area for the pool 32 x 16 (no landscaping or deck) were about $25K for a gunite pool, $18K for the cement wall pool, and $14K for a steel walled pool. The cost of the gunite plus the cost of redo-ing the coatings every 6-8 years (neighbor's experience) didn't make sense. So we looked closely at the steel pools. The Cement wall pools are sold by a vendor who has been in business for 30+ years with lots of local recommendations. We talked to the sales people for 3 steel pool companies, and found that they were in business for an averageof less than 2 years. In fact, several had actually changed the name of their company several times ... a big red flag. In the end, we went with the established business and the middle-of-the-road cost. We are completely happy with the vendor.
I had heard that you run risks of rusting ourt steel pools when they are not installed correctly ... and I'm not one to trust a fly-by-night operation.
I will tell you that my best friend purchased a steel-wall pool. He's had a bit of trouble with a leaky liner that needed to be replaced 2xs. Otherwise he likes his pool.