Long admirer of Donald Judd's swimming tank at Marfa, Texas, I think above ground pools are way cool.
Above ground pools are particularly good if you can use the height to meet pool fencing code requirements. Accessing a 1.2m high pool off grade is clumsy and hard to make right but with our tank we will be accessing it off an adjacent deck by way of a gangplank, allowing the tank to sit quite comfortably at 1.2 m or higher.