This is a very nice time piece. I own it for more than 5 years now, got it as a gift. Model Eco-Drive WR 100, stainless steel, blue dial. After more than 5 years, the watch still works when exposed to light, but is not reliable anymore in low light conditions. I can not rely on it being reasonably accurate when I do not expose it to bright daylight or artificial light at least for 1 hour a day, perhaps more. It used to work for months from full battery charge in dark conditions, now it is enough to leave it in dark/low light for a day or two for it to start skip time and be late. Dramatic performance decrease since original claim in specs. that it should work for 180 days out of rechargeable battery only (e.g: in drawer). Therefore, the claim that the watch never needs a battery is simply not true, at least for older models like mine. I am not sure what type of rechargeable battery mine has (perhaps it is older technology with memory effect, not Li-Ion). I guess every 5-7 years you need to replace the rechargeable battery just like you would have to replace regular one every 3-5 years. Otherwise this watch is very good. Durable, good looking, resistant to scratches, feels nice on the hand (I like the cold heavy feel of steel watch). Not worth the price tag though. If you can, look for deals under $100. I saw good looking solar watches in popular retail store for $50 years back. There are also watches with regular battery that last 10 years and also are less pricey. The choice is yours.