The pads are simply rather cheap, but thankfully comfy. They have some glue that cannot take the machine wash. It's preferable imo if pads are designed in a different way, like on HD600/650 for example (two parts). All my notions just point to the overall quality, but hey, if you like to pay premium for cheapness and wish even others to do so, then...? For 300 € you can expect more - Sundaras cost around 350 €.
I'm enjoying my Sundaras though, have blasted songs through them a serious amount in hours, but I don't find any reason to deny if some people critique them or even dislike them - I certainly see the reasons for this. It's like people cannot enjoy their audio equipment if someone says the thing is imperfect.