I have other nice watches like a Tag Heuer quartz and a Tissot automatic, but I have been wanting a Citizen Eco-Drive for a long time. I finally chose the AT4007-54E because it had all the features I was looking for (Eco-Drive, atomic timekeeping, perpetual calendar, anti-reflective sapphire crystal, chronograph) and I have been wanting a black watch to add to my collection. This watch has it all. Don't overlook the fact that this has a sapphire crystal, something that's typically reserved for the Citizen Signature Collection. Even at the full retail price of $600, this is an incredible value, but if you can get it for less, even better. The first thing I did when I got it was read the manual and test all the features to make sure everything works as it should and it all worked flawlessly. It's kind of fun to watch the hands move around when switching from one setting to the next. After being in direct sunlight, the illumination on the hands and hours is very bright although it doesn't last more than a couple minutes in complete dark. The best thing about it is the way it looks and trust me, it's even better in person. At 42 mm this is a good sized watch and it does have a busy appearance, both of which I like, but some people may consider it a drawback. I personally can't stop looking at it. I've only had it less than a week so I can't comment on durability, but in my time researching Eco-Drives, I haven't read too many complaints. There's probably a reason Citizen can offer a 5 year limited warranty on their watches when most other companies have a 1 or 2 year limited warranty. To summarize, I am completely satisfied with this purchase and would definitely recommend this to anyone looking for a quality, low-maintenance watch at an extraordinary value.