I bought a great jacket. I posted nothing on forums, anywhere, and posted no reviews to say it was great. There are always a few moaners, and more importantly, there -are always- products which fail.
At the end of the day, you are buying an item vastly reduced in cost compared to some alternatives using similar materials, at something like a quarter to a sixth of the cost. There is no such thing as a free lunch, and therefore you are going to have to deal with corners cut in the manufacturing process. If the quality, craftsmanship and materials were all top quality, we wouldn't be talking about a bargain item and instead they would be sold out.
Peter's comment is a fair one, a lot of the time you just do not need huge coats, and can get away with a lighter jacket which is going to give you water resistance, with your layers keeping you warm. Since you are starting walking this time of year in the UK, I'd suggest investing most of your funds in a good base layer, and a decent, wind resistant softshell with a DWR coating. Stick a microfleece in your bag for camping/unexpected turns in the weather, or if you need some extra warmth. You can get a decent soft shell with a hood for £70-100 from Rab, and potentially from eBay for around half that. You will keep this item for longer than you would an event jacket you can stand in the shower and stay dry in.