I just got a hire quote for those plastic packing crates for about 10 days and it came to £350! WTF!
We got a house full of stuff packed into boxes provided by the removal company for less than £200 extra.
Unless you're absolutely skint, it is absolutely worth getting a removal company in and getting them to do the packing – you don't have to do anything much until the day of the move.
Obviously if you're doing it yourself in hire van or something, you might save a fair bit over getting removals in, but if you have enough that you are already paying someone else to drive vans for you, the extra they charge for packing makes moving so much easier.
Joe