I have been using it in my business for years now. Every time it was needed, it proved to be a valuable tool and saved us from a big trouble.

I got it for my desktop computer because besides power outages, I also have an issue with the house. As soon as 2-3 devices are connected, the circuit breaker trips. As for the UPS, it's not from me, I can't imagine it as a runway model.. uh, I mean requirements! In 50% of the cases, it managed to switch to battery power, mainly when the power grid of the electricity company went down. However, when the house circuit breaker tripped, the PC would shut down and then the UPS would kick in.. it just doesn't have a fast enough switch time. Now, after 2 years, when the power goes out, the PC shuts down, and the UPS shuts down too, HAHAHA! The battery is probably dead, but it doesn't even notify me in any way that something is wrong. It doesn't even have a USB port for me to check with some software, it doesn't matter.. I wanted a 1000VA UPS for 50 euros, well, I guess I'll have to deal with it.

I have it for almost 3 years! Overall, I am quite satisfied with my purchase compared to what it offers and its price. It was necessary in my house because if we turn on some appliances, the general power goes out for fun and I definitely didn't want the PC to turn on and off like that, as the consequences could be disastrous. Also, you don't worry about losing the work you are doing due to a sudden interruption.

In 2 years, I had to change the battery. The only negative thing is that it makes a little noise sometimes (beeping), but it's not that annoying. Now, at 3 years, a few days ago while I was playing on the PC, the UPS suddenly shut down (thus the PC) even though there was normal power in the network. Maybe it's a sign that "its days are numbered". If it happens again, I will replace it. The most likely thing is to get exactly the same one. It didn't do too bad...

UPDATE: In the end, the battery just went off again. The UPS was replaced and it is working properly.

I have two towers connected, each with a monitor.
In one, I have a gaming PC (and the router) connected, and at some point when the power went out while I was playing a game, the computer shut down. It stayed on for at least 5 minutes when not gaming (after which I turned it off).
After I installed a power consumption meter, I saw that the devices connected were consuming 220 W when not gaming, and the UPS held up. As soon as I started a game and the graphics card kicked in, it started fluctuating wildly above 300 W and then completely shut down after 5 seconds. After disconnecting the UPS, I measured the consumption with a meter and it reached 370 W, which apparently it couldn't handle, even though the specifications on the box said 1050 VA (630 W). In practice, it turned out to be somewhere in the middle for me, around 320 W.
The second PC, which is less power-hungry and was also running a game at that time (I measured the consumption afterwards and it was 280 W), remained on.

A star cannot handle a 650v HP workstation when something is wrong with the technical specifications, I suppose... for lower requirements, everything is fine...

Quite good for its price! It can keep my computer and monitor running for 15 minutes before displaying low battery level (amd fx4130-radeon hd7770) while I'm using the computer for internet browsing.
Pros: Cheap, simple - easy to install/use, without unnecessary features, 2 socket outlets, silent when used from the DEI network - when used with power outage it makes a small noise which is normal during power conversion.
Cons: It smells quite bad like burnt plastic even a week after its purchase, low-quality materials internally and externally, for 1050VA I expected 2 batteries of 7Ah or 9Ah and not 1 for longer power outage duration, it gets quite hot.

In the end, for someone who is looking for a simple and cheap solution to protect their equipment, it's fine. However, if someone wants more features like battery level monitoring through a screen or connection to a computer or better quality materials, they have to pay double or even more for the same VA.

Economical and quiet! I sleep in the same room with it and it doesn't bother me. The materials could be better and it could show the battery level, but you get what you pay for. I highly recommend it.

Edit 20/09/2017 - The batteries died and I need new ones without ever letting them completely drain