[Disclaimer] I've never had a real dripper before so my critique may just be uninformed and I have no prior context for comparisons.
I love the capacity/deep well. Yes, we used to occasionally drip on modified attys a few years ago but that was usually something like a modified cartomizer and good for just a couple/few drags at high ohms. Not practical.
I really love the air design, capacity and control (more on the control below...). My preferences are more towards wide open. It's simply outstanding. Some annoyance with other air designs is noise. Whistling, etc.and in general anything audible. Wonderful in this category through the entire range that I might be using. The adjustment is continuous and easy.
Deck: Hardware is perfectly positioned vertically. The fact that the center post hole is drilled about 1 coil diameter above the ground post holes brought a smile to my face. I wonder if anyone has thought of a "T" bar center post? With connection holes at each end of the cross bar. The ends of the cross bar about 1/2 average coil length from center. Then you wouldn't have to sculpture the coil tails to position the coil dead center and square with a diameter line. Connect the coil to the ground post (moved 1/2 coil length in towards the center) and the far end of the T bar center post.
I'm worried about the size of the ground post and screws. I'm worried that in clamping a wire down to where I'm sure it won't loosen I might strip the threads. Maybe unfounded. Maybe that could be a replaceable component instead of part of the deck?
I generally don't pocket carry anything so I think the top cap resistance is perfect although my first thought was "if this loosens at all it will be too loose".
Do we need a spare o-ring set?
Delivery box: Very nice touch. Classy. Befits the product.
Naturally the manufacture and materials are superb.
Manual: I didn't get mine yet

. I have no shame so I will relate the following: I did not read or watch any reviews prior to purchase. (heh, I had to replace my 4 year old gear so I did some research/polling and started with a Poldiac/TNS and a mini. That far exceeded expectations so I followed up with a Nanos/DID short for my carry solution. During that last bit I got caught up and figured I should try a dripper too). So I get my OverOne, unbox it and find that it ships in the closed position... Tried unscrewing the two halves. Seems its kind of like a Chinese finger puzzle. If you try to just unscrew it, it resists (lol, slow and easy wins the race). I didn't think of o-rings being in there. I'm sure being new and dry contributed as well. I tried and tried just pulling it. I almost burst a blood vessel trying to force my thumb nails into the seam to spread it. After 15 or 20 minutes of constant, vigorous application of all the above it was open to the width of the windows. No, at the time I still didn't know what had accomplished that. Looking back, it had moved just a bit on each twist attempt. Also, I am assuming the copper center post is fairly pure and therefore very soft? I am fairly mechanically inclined so I thought of that and took care just in case. Miriam(?) does use her needle nose to snug that in the setup video. If this is the case a note might be in order for those unaware. Specs on the replaceable bits are in order.
Dripping in general: Awesome -- with tradeoffs. I've very much a genesis person, so if I use the dripper for a day the wicks are "musty" enough that I have to replace them. And you have to drip. And they can get messy if you don't take care. I'm really glad I have one. Great compliment and departure from my mesh attys.