We have two dehumidifiers, one electrostatic, and one deLonghi DS 105 compressor type (not sure if that is the right name). The electrostatic one is totally useless (and was cheapish anyway), and the deLonghi, which is at least 10 years old, continues to run superbly with narry a hitch -- and it is on 24/7, but set at a middling setting (meaning that it mostly runs in the summer, at higher temperatures, and turns on very infrequently now). It also seems to take very little electricity. I'd recommend the expensive deLonghi, as I think you get what you pay for.
Our heat pumps are pretty poor at dehumidifying, while being excellent at heating and cooling.