my girlfriend bought that
the fact the filter is built into the hood seemed great at firft, until came time to gravel vac. you need to remove the filter pump completely and the heater bacsue the wires run through the cover and the filter pump basically hangs from the cover.
the mechanical cartridge also has carbon built in it so if you want to add plants, or change the carbon, you need to replace the whole thing.
I had my girlfriend completely remove it, bought some fluval sponges, as they are basically the correct size and some aquclear 300 pouches for mechanical filtration and to hold the sponge in place. the biowheel is nice but can get noisy because this thing pumps a whole lot of water. IMO it is overfiltered, which is good in itself but it produces a very strong current for such a small tank. the heater is awesome though, very high quality
all in all, not a bad tank, but not too good. by far, i prefer the hagen waterhome units. with the eclipse, you'll need to buy a fishnet, a thermotmeter and some food as they give very little food with it. the water conditioner will be just enough to start up your tank, though this is pretty common for packages like this. for almost the same price, you can get a waterhome 20, which is much bigger, easier to maintain and easier to customize. it comes with everything except water conditioner, they give very little. the food they give you will last you months and the filter is very quiet.
We both prefer my waterhome over her eclipse. Don't get me wrong, the eclipse is very good, the filter keeps the water very clear but the fact it's built into the hood just make it very complicated to remove the hood for maintenance and such...