Easy to assemble, despite only having one arm and hand that works properly. I'm right handed and my left arm and hand were paralysed by a stroke a few years ago. I got the large size, which seems larger than NHS standard issue. I'm quite unsteady on my feet, and love being able to go shopping independently to the supermarket a short walk away. The under seat bag is big enough for my modest needs - cereal, milk, sugar, ready meals, tinned fruit and ice-cream. The brakes are strong, the seat comfy for a short rest.. I love my grey roller.