Firstly I am a drummer, been involved in bands and music for over 40yrs so I think I am well placed to judge this product. I switched to IEMs around 10 years ago and haven't looked back since. I have tried numerous products both expensive and cheap so I have been trying to find some mid-priced ones to try. It didn't seem to matter if I spent £30 or £250 they lasted around the same time. I.E. 2 years or so with regular weekly gigging and rehearsals in between (some really cheap ones just over year or so) so I've been trying to find a set that have the sound quality I need but won't break the bank if I have to replace them every couple of years. Well, I got a recommendation from a you tube channel who tested IEMs in 3 different price bands and they recommended these. So I thought I'd give them a try. I am not disappointed. They sound fantastic and not "just for the money". They are truly of professional quality and their performance far exceeds their price. They have 2 drivers in each ear piece but each ear piece has 5 frequency filters or "crossovers" as we call them in the trade, which separates the sound so you get crystal clear clarity in each of those frequency bands. I am so impressed I have just ordered a second set just in case the price goes up. I would put these on a par with higher priced Westones which I have used some years ago but are around 6 times the price. Yes they were better but not by as much as the price suggests. Time will tell of course as to how long these will last but so far I have used them several times in rehearsals and at home practising and also at a couple of gigs and they are performing superbly. I am able to have the volume up quite a bit louder compared to my old IEMs without any break up or distortion of sound. They came with 8 sets of buds and I was able to find a pair that fitted snugly. Very important when setting up your IEMs. Fit is key, People complain that there isn't enough "bottom end" or the high frequencies are missing .... well, the actual fit is most important. If they work their way out just a little bit then you will lose the "seal" and that tonal quality and hence complain about them. Having them fitted right in with the ear canal fully open results in outstanding sound quality across the full sound spectrum from deep bass to top highs. They are lovely. Get the fit right and you wont regret it because it will be time well spent. They seem to be made of decent materials, have a nice weight to them and the cables also seem very well made. In most of my experiences, its the cable that tends to break down or the actual connections on the IEMs themselves. They have removeable cables which is a must these days and if I have just one complaint, and it is relatively minor, then I would like the cable to be at least half as long again just to make sure that the cable is tucked down safely and snugly under my clothes to my micro amp on my belt area but I can use an extension cable for this. The cable will reach down to your waste quite comfortably but its when you have to "route" it around your body where it falls short. For reference, these are plenty loud enough for on-stage use. As stated, I have a decent micro amp and I have also used them connected directly to my Samsung S20FE phone with a short usb-c to 3.5mm female adaptor lead and they are superb for this as well. In summing up, I am really pleased with these and in my own experience and for the uses I need them for then I can highly recommend them.UPDATEThe second pair that arrived sadly had one faulty ear piece. I bought a blue set for a change as my first set were black, not that this should make any difference but it is what it is. It did not put me off getting a 2nd pair. I was refunded quickly and I sourced another pair seeing as the first set were so good.2nd UPDATEReplacement pair arrived, of exactly the same colour and type as my first pair and work perfectly. I said it before, these are superb quality. The 2nd pair that I ordered that were faulty but didn't put me off at all. Things happen from time to time and whilst it can sometime be frustrating, the refund was hassle free and very quick. All is still good with my first pair which I have so far had somewhere around 100 plus hrs of usage with no problems and they actually sound quite a bit better now that they have had a chance to "burn in" as we say in the trade. Great find.