Never heard of that brand until you mentioned it, but a visit to the website says it is a quartz type electric heater. Quartz heaters are radiant heaters - they don't heat the surrounding air like a ceramic or conventional resistance heater. Instead, the invisible infrared light emitted by the heater warms anything it strikes, just like sunlight does. That make sit good for outdoor use, e.g. a patio, because it can warm the people without trying to heat the entire space, but often is less effective for warming a room.
All portable heaters have a max output of 1500 watts because of safety regulations, so they all have equivalent quantity of heat. And all have a safety shut-off device built in. The differences among them are the type of heating (radiant or convection), amount of fan noise, type of thermostat and other minor features (timers, oscillating, etc.).
If you think a quartz heater is the right type for you, I suggest you Google 'quartz heater' or use a shopping search engine like Yahoo Shopping to look at the numerous makes of quartz heaters. And check your local Walmart, Target, KMart, etc. They usually carry at least one brand of quartz heater. If you but it locally, you can return it easily if you find that quartz doesn't work well for your needs. I couldn't see anything unique about the Edenpure brand (except maybe the quantity of hype in their ad), so you can buy a similar heater almost anywhere.