Gorgeous pool. I am very happy for your family - especially those little ones. I think that I will contact your pool builder soon to have a pool installed before the swim season of 2019. I am very impressed with their efficiency. Start to finish in about 2 weeks (considering their workload) is impressive to me. I know that you may feel a little differently because you were there all of the days that they weren't there (probably wondering where they were and why weren't they working on your pool with all of this good weather, etc.), but all things considered, I think 2 weeks is impressive.
I love the sun shelf and the liner-over-steps. I definitely want the same when we build. We are leaning toward a "lagoon" shaped pool and I noticed that the builder used treated plywood walls for your geometric pool. I wonder what the builder will use for the curvatures of a free-form pool. Regardless, please share anything that you recommend in reference to dealing with this pool builder. Any helpful tidbits will be appreciated. Now, go crack a beer and get some relief from this oppressive heat in that beautiful pool.