I bought this mouse a month ago, from the beginning it didn't work well on surfaces that my previous mice worked just fine. Occasionally, during the day it would lose good contact. After a few weeks, it almost completely stopped responding on surfaces that it used to work perfectly on, resulting in me not knowing where to place the mouse. Imagine, even on the Mousepad that I had for so long, it didn't work at all, not even from the first day with new batteries and it was properly connected to my laptop. Today, I tried to connect it to another computer (with new batteries, mind you) and although it was detected, it couldn't establish a connection. DO NOT BUY IT!

Very cheap construction feel, the pointer jumps instead of smoothly scrolling and it requires 2 batteries per week with daily use.

For its value, it is very good. Indeed, it goes into standby and the user does not notice it, and sometimes it blocks, but very few times. Some laptops declare on their own that when you activate Bluetooth simultaneously with WiFi, there is a high chance of interference because they transmit on the same frequency.

I got it for my laptop, for moderate use, but you simply can't operate it! It freezes at least twice an hour. It requires closing and opening to unfreeze. Sometimes it unfreezes on its own after 3-4 minutes if you have the patience to wait for it. The only positive thing is that it doesn't take up a computer port because it connects via Bluetooth.

In the positives: It is very lightweight, so it doesn't tire the hand. It takes small batteries (AAA). It responds immediately to movement and button presses. It has buttons for forward/backward in the browser. It has 3 resolution settings (which make the pointer move at different speeds).

In the negatives: The instructions in the packaging are terrible and do not explain that you need to hold down all three buttons for 7 seconds for the Windows to "recognize" the mouse, which led me to initially assume it was broken until I figured it out. One of the two batteries is difficult to remove because it is too deep inside. The on/off switch is very small and sometimes difficult to move. The batteries last less than 1 week. Lastly, it disconnects every 3 to 4 hours and I have to close it and reopen it for it to work.

Edit: Within 7 months, it broke on me, it double-clicks instead of a single click with one button press. But that's how it is, what do you expect from an 8 euro mouse...

Well, everything is positive with this mouse, especially considering its price. Because it is Bluetooth, it does not consume a USB port, which is why I bought it (be careful, you can connect up to 7 Bluetooth devices at once). Although it seemed small to me and I thought it wouldn't be comfortable for me because I have relatively large hands, it ultimately satisfied me to the point where it feels more convenient than larger-sized mice. As for power consumption, I cannot have an opinion yet because I am too lazy to measure currents for calculations (maybe I will do them at some point). As for the disconnections mentioned by others, that is not true. What is true is that the mouse automatically turns off after a certain period of time to save energy and you just need to press a button to turn it back on and reconnect (most mice require this). If I notice anything, I will mention it. Now, the only problem for me, unless I received a defective device in this aspect, is that the buttons on the left side of the mouse have reversed functions, meaning the upper button, which is supposed to execute the next page, executes the previous page, and vice versa, the lower button, which executes the previous page, executes the next page. This is a huge problem for me, as it is as it should be on a regular mouse, and you really can't get used to it. But it can be easily solved either with a program or with hardware modification. I did the hardware modification and cut the traces of the buttons on the circuit board and soldered them upside down with a cable, so the buttons work perfectly.

Continuous disconnects on Surface Pro 3.
With every restart, it requires opening and closing. Even resuming from standby!

Overall, someone could say it's okay for its price. But if you're used to the feel of a simple Microsoft mouse, then you won't be able to operate this. Your joint will start hurting within 10 minutes