I am the owner of this microphone for about 1 week - 10 days. I have to say the following regarding its positives:
a) VERY STURDY CONSTRUCTION (to the point that when some people saw it, they thought it was the shure sm58), I don't know exactly what material it is, but I could describe it as a metallic construction.
b) It looks very high-quality to the point where you definitely wonder if you paid only 20 euros for it.
I won't mention the negatives as I haven't worked with it for more than a month, so let's call them neutral.
Regarding the "neutral" points:
a) It gave me some trouble with Adobe Audition, honestly, I don't know, I struggled for several hours to set it up properly, but when you pressed rec 0 background noise, it was evident within the sound when you tried to boost it. I don't know what glitch it had, needless to say, it fixed itself after 2 days (????).
b) It is quite quiet like any other dynamic microphone, and let's be honest, dynamic microphones require intensity. It is connected to an analog mixer (I won't mention the name because I've had it for over 10 years and for me, there are many better options for the same price). The mixer provides a maximum of 60 dB intensity, so its intensity is around 2/3 clean without effects, reaching around 30-40 dB, so the intensity it provides without any processing is relatively good. (Obviously with compressor, EQ, noise gate, d esser, and a little reverb) you would think you don't have a 20 euro microphone but a high-quality dynamic microphone worth 375 euros (you know which one I'm talking about).
c) It lacks a bit in the high frequencies, at least for my taste, but with the mixer, everything is fine.
In terms of quality, as soon as you take it out and connect it without much fuss (on a mixer that costs no more than 30 euros), with a good XLR to XLR cable without EQ, compressor, reverb, noise gate, d esser, I would give it a 6/10, and we're talking about a cost of 50-60 euros because for this price, there are other category microphones (USB) with software that produce a "better" (not necessarily higher quality) sound, but it's wrong to compare them.
With all the effects I mentioned, let's not get carried away, obviously, it does wonders, so I believe an ideal rating would be 9.5/10.
Extra tips:
a) If you want to invest in a good sound card (analog), one from Scarlet would be ideal for this microphone. Of course, there is also the option of a digital sound card, where for me, the go xlr is one of the most worthy sound cards as it has all the features I mentioned above on the fly, so the processing, if not non-existent, will be very minimal.
b) There is a free solution where you can improve any microphone by adjusting noise reduction, EQ, noise gate, etc. This program is one from SteelSeries Sonar, which does a decent job to save you some trouble, but the downside is that it doesn't have an on-the-go compressor.
I consider it to be a very good performance for a 20 euro microphone, but don't forget to factor in the cost of an XLR to XLR cable, (6.35 cables if you have an analog mixer), mixer - sound card - audio interface.