AKG K-52

PROS:
-Very lightweight and comfortable;
-Decent quality for 30€, but do not expect "high quality" as I saw many people (and AKG) writing;
-2.5m cable, which could be a pro but also a con :D ;
-Decent bass for the price.
CONS:
-Very bad isolation;
-Really bad frequency response: highs totally messed up, mids with strange behavior;
-Consequentially, stereo image is pretty messed up;
-Materials do not feel like solid, balanced or strong - they're still acceptable for price range.

I am a master's degree student in electroacoustic composition, ergo: not an expert but not just an enthusiast.
I have to say my recent headphones have been AKG702 and Beyerdynamic 990 PRO, also in these days I am listening in a very great studio (well treated - enormous Genelecs), so my standards may be strongly influenced by this.

So, these headphones are pretty much ok for the money you're about to spend. But do NOT expect a decent isolation, a reasonably fair frequency response, a nice stereo image.

I just thought this pair of headphones would have been something better. Unfortunately it does not satisfy me, so I will send it back.

It's a very good pair of headphones. Weightless, comfortable and kinda worth for first home studio choice. Meanwhile, as a backup pair, taking the seat of my favourite DT 770, it's good. Its good for its price.
Also i was thinking if this is a quality pair of headphones for a home studio. Yeah ok it is. When I first unboxed it, I saw and felt the low quality plastic materials, but, once again, for its price it's good.
Now the sound. Ok they have kinda lovely sound, flat, but not almost flat. Something like when you adjust the volume of the audio interface starts a beat peaking before the peak level. Is the reason for that the ohms? - I don't think so.
The type of the product, I'm 100% sure is not closed.
Volume knob 30% - everyone in my room can hear what I hear.
Volume knob 50% - everyone in the next two rooms can hear what I hear.
If move them upon my head, lay them on the desk, move from room to my hall, I still hear them. So I think this item it's worth to start from a cheap pair of headphones, but not as described.