I have two, one for guest, one for me, and they are absolutely lovely and it keeps my heating bill down considerably.
Cannot recommend them more highly as I'm a shivery soul.
One is a Livivo and one a Dreamland, both washable, both bought on Amazon, both washable.
Worth every penny, but you dont need to spend £100, around £60 should do it.
I've got another 'keen'... Ouch!