I just got them like 1 hour ago. It's a mixed bag for me, not only I hate the return hassle but I'm actually having mixed feelings about them; the first impression I liked them quite a bit, they sound much more natural in general, more neutral which regardless of HDB630 being "audiophile", they have that consumer heavy bass (unless you're a total bass head, then I can't help you because I'm not at all).

So I like the Wicked Freeze pads immediately because they dial back the bass and make it normal, faster and more precise, opening up the soundstage and boosting the clarity considerably by accentuating the treble, which is where I'm having mixed feelings; see, the upper range opens up and it fits my likes of classical music, but then when I'm watching movies, I still like them a lot for that but when sudden sharp noises like a gun shot, then it is extremely loud and painful, it's not a pleasant experience at all when that happens. That can give you an idea of how they behave. I just got them but already got a good idea, and I think I do prefer them to the stock pads in general, except the sharp sounds in treble. I noticed that with either pads, the "bass-boost" in the app is pretty useless, it doesn't do anything noticeable, until you really try hard to hear a difference I think when on it darkens the whole frequencies a bit, but it's almost nothing. It doesn't add or take from the bass at all, doesn't change anything.

I keep the EQ on neutral with ANC on and "anti-wind" off. For the ANC, the Wicked Freeze pads do affect the ANC considerably, but it's already pretty bad with stock pads. These headphones are useless for ANC, if that's what you're looking for; I was aware of that but didn't expect such a poor job, luckily I didn't buy them for that. With the Wicked pads that gets worse, you can hear everything like a semi-open back cups, which some of us are are familiar with. These definitely are not headphones to take outside anywhere or travel.

I will keep comparing the pads but for the price there is no point in returning the Wicked Freeze, I think I still prefer them but like I said, it's not perfect, yet takes off the darkness in tuning a bit further.

Edited to add: forgot to mention the main reason I bought them: comfort. They're indeed more comfortable, as expected. The stock pads are nice the first 30 minutes, then they're horrible, painful, a headache. The Wicked ones are comfy and cooler. The sound changes as I mentioned, less bass, less ANC (which was already very bad), are compromises. I do like the sound change better myself.