please recommend me a really good waterproof riding jacket!

Thank you!

Subscribed. I need one too.

Was at go the other week and came across this:

http://m.gooutdoors.co.uk/mammut-kento-jacket-p266328

Not cycling specific but fit is excellent, packs down quite small but still feels pretty durable, material has a slight stretch to it which I really like, the arms are also a bit longer which works well on the bike.
But of a drop on the rear, BIG underarm vents and most important very very water proof.
It has got a hood but I like that anyhow.

Got mine cheaper than advertised also, all in I’m really happy with it.

Depends on your needs…
How far do you ride? If its a short distance just get a simple race cape, bit longer something with vents so you don’t boil.
Carrying a rucsac/ courier bag? You’ll wear through the shoulders in less than a year. So buy something relatively cheap and replace it regularly.
Want lots of reflectives? Altura and Mavic do good hivi jackets.
You do have mudguards don’t you?

Paramo Cuzco.