I LOVE them. I'm switching everyone over to them. Huey has an empty one sitting in my kitchen waiting to be set up. I used to have all marineland eclipses but I had issues with lids leaking when I used a bubbler and difficulty in getting into them to clean them.
The whole lid on the hawkeye raises up on hinges so you have access to the whole tank. The filter is simple and you can add any sort of media you want to them if you want. I added ceramic rings to all of mine. Also, the filter is not integrated so if you want to switch filters on them, it's simple to do so. It comes with a flourescent 9 watt daylight bulb that my plants are thriving under. Here's pics of mine: