The poor man's Casio A158/A159 but with a better backlight?
Yes. But in gold because sometimes I like to feel pretty too.
It's just plating, and whatever they do to a stainless steel bracelet to make it gold-tone, but it looks nice, it's comfortable, weighs next to nothing, and it has all the same features as a Casio including the obligatory alarm, hourly chime, 12/24 hour modes, and a stopwatch which nobody uses.
I haven't worn this watch much, and I haven't tested the claimed water resistance of only 30m. I assume it to be okay for washing your hands, but it hasn't been in my paddling pool with me because I don't want to intentionally wreck it.
Viewing angles are as good as Casio. You don't get a display full of "88:8888" by tilting it.
Same kind of backplate as a Casio with little crosshead screws just waiting to be lost on the carpet one day. Slightly thicker and bulgier due to the EL backlight, but it's negligible in comparative dimensions to a Casio.
You can swap this module into an F-91W and vice versa as long as you also swap the backplate when you do it, because it's slightly thicker. Why you would even want to do that is anyone's guess though. I did because I could.
Roughly, it's 35mm across (including the buttons), 38mm lug-to-lug, and 8mm thick. The bracelet joins the case with 18mm springbars, but the bracelet flares out to 20mm and tapers down to 17mm at the clasp. It has the same clasp as a Casio bracelet too but unsigned.
I think the case is plated alloy rather than plated resin like the Casios have. It feels more solid, but it's no heavier. Finishing is very good with no extra bits hanging off it or anything misshapen. It's very smooth with less defined edges than a Casio but not by much. It seems "rounder" and more '90s, I suppose.
The plastic crystal and whatever you call the sticker attached to the underside of it (since it's not really a faceplate) is very shiny, which is completely unlike a Casio.
I'm no good at taking pictures of it with the backlight on, but you can see that it works, is ridiculously bright, and it's much better than the more expensive Casios. You'll just have to take my word for it, because it won't stay on long enough for me to get the iPhone in position to focus on it.
The backlight will stay on for a couple of seconds when you push the button, but it doesn't stay on while you continue to hold the button in, so you won't wear the CR2016 battery out too quickly. I have no idea how long the battery will last though because I haven't had this watch long enough to find out. I'd estimate 2 or 3 years battery life, but that would also depend on the quality of the battery too.
I don't know how much the Skmei 1123 costs because it was a Christmas present from my wife. I think they are less than £10 most of the time on eBay or Amazon, and even less during the many AliExpress sales. Are they worth it? Well, considering that you will pay a premium for a real Casio A158 or A159, and three or four times that price for the gold versions (because that's what Casio does now), I'd say that it's very good value indeed.