Cranial technologies took care of our son in a time that was scary and I knowledgeable for new parents. Our son wore his helmet 24/7 for 4 months from the ages of 4.5months-8.5months and was a candidate for a second helmet.
Our technician was honest in saying that with a second helmet it was not a 100% guarantee his head would be perfectly round but more of a cosmetic procedure.
Our son did great with wearing in the summer months and paid no mind to it.