Rex's case is an interesting study to the choice between density and coverage.

Rex's fist HT was carried out at some other clinic 3 years ago.
One of the things that physician did was spread out the grafts all over the bald areas at a low density.
The result was not pleasing and Rex was dissatisfied with that HT.

Note how the low density of follicular units in Rex's crown fails to give any aesthetic benefit.