I have a rental condo in a West Coast city that doesn't get particularly cold for a long period of time, but with (very) occasional spells below freezing. It's heated using two resistive type fan/coil electric heaters made by Thermador.

The A/C unit looks to be late-70s/early-80s vintage GE, beat up to hell and back, and I don't want to hear about it when it's rented , so I'm aiming to replace it while I do some other repairs. I'm looking at the following unit, which appears to fit the existing GE sleeve.

http://www.amazon.com/Frigidaire-FRA12EHT2-Through-Conditioner-Supplemental/dp/B004P8K37S

A few questions:
(1) "Supplemental heat" -- is this thing actually an air-cycle heat pump in addition to an A/C unit, or does it just heat using resistive coils? If it's the former, I could ask the tenant to mainly heat with the unit -- more efficient and a bit safer. I'd keep the heaters for emergencies or really cold weather.
(2) Has anyone had experience with the unit, good or bad?
(3) Any other recommendations for package heat pumps under about $700? W x H cannot exceed 25 x 14.5, and it should be a 230V unit.
(4) Lastly, how does one remove the old G.E. unit from its sleeve?! This isn't readily apparent.