I've been following this thread as I too want a smarter and longer waterproof than my Arc'teryx goretex.
Unfortunately, I'm 5'10" with long arms, a relatively short body and a large chest. So trench style macs don't suit me, anything belted doesn't suit me, and I can't wear anything double breasted or with an asymmetric zip / fastening.
What I wanted was a thigh length waterproof coat that could pack into its own pocket or hood and fit in my handbag. Ideally in a dark colour, with minimal details and I wanted the cut to be slightly fitted at the waist. Oh and my most important requirement was it had to be as cheap as possible, but no more than £100.
From reading this thread the Uniqlo blocktech was at the top of my list, but I wanted to look at it in person when I head into London in a few weeks time. I'm also wary that the info on their site talks about it being water resistant and not waterproof. I'm a walker, I have a waterproof gore-tex, I have a water resistant softshell jacket and trousers, I've had other water resistant coats years ago too. Yes they keep you dry for a bit, but not for over an hour in torrential rain.
I went into Decathlon for some bits for my DC and came out with this. It's not quite as minimal is I'd like (I'm not a fan of patch pockets, but these don't accentuate my wide hips), but it rolls down into its hood and fits in my handbag; it's properly waterproof, the hood when not worn sits close to the collar without gaping, it's a cloth fabric rather than plasticky, but it is a bit rustly.
I've got it in S/M, I'm a 12/14 (32F bust) and it fits me nicely. However I find it a bit too tight in the elbows / awkward to use the chest pockets compared to my Arc'teryx, but that was designed for climbing and has articulated pre-bent sleeves (that translates as baggy elbows when stood upright!). The M size felt a bit too big even with a jumper on.
Overall I'm very happy with it.