Antenna-based reception is all about location, location, location. What works well for one place, may not be good for all places.
Florida is flat, helping long distance reception. That antenna seems like it would be ideal for your location.
Having had some experience with large TV antennas in the past, Swerd is absolutely correct in that where the antenna is located makes a big difference. Things like water vapor, trees, etc., can be big factors for UHF reception, but atmospheric skip can be cool especially in the summer where I live.
That said, there are some DTV channels in the US that are still on the VHF band. I live in one such area where there is at least one channel still on VHF. If anyone were to buy this antenna and they are expecting to receive VHF channels, well, they are out of luck. One would have to use a separate VHF antenna along with this antenna to receive the VHF channels.
Also, a rotator might be a desirable option for some. Then, however, one needs to consider the wind load on such a large antenna and whether the rotator can handle such a large wind load.
I am located in a valley, and as such, I cannot get as many digital channels as I could analog channels - which sucks, IMHO. I can basically only get local channels where analog used to bring distant stations, too. The digital TV revolution held so much promise for OTA reception. I'll blame way, way, way, way (did I say way enough

) outdated by the time it was implemented 8VSB modulation.