Absolutely fab! Bit pricey at £220+ but well worth it. Brought my lad one for his christmas pressie last year. It doesn't rub or move and kept him nice and warm and dry all winter. Being able to buy and change the liners is brilliant as it means you can practically use the rug all year round (so in my opinion validates the money!). Only weird thing I've found is the 300g liner that comes with it originally doesn't have the leg arches cut out so gets a bit muddy but the seperate liners do have the arches cut so fit better.
I'd recommend and would def buy again if need be! (hopefully not yet though cos his isn't a year old yet, planning on it lasting much much longer than that!!!)
My friend has one and raves about it. I'm with AmyMay though, anything with 'Rambo' on it is good! I think the price is ok TBH, considering it'd cost far more to buy two Rambo (or other good quality) 100g and 400g rugs with detachable necks, and more than the £30-£35 it costs to buy new liners, to buy a 200g and a 300g rug! Plus washing it is cheaper too... pays for itself IMO!
Must of been a faulty one - I bought mine when they first came out and it's been a brilliant rug. I've also bought the separate liners - it's the only rug I use/need now.
The neck cover has some fill in it - not sure what the weight is though.