Has anyone used bloc blinds?

[reup]

www.blocblinds.co.uk/window_blinds/blocout_blinds

They are really expensive (£300 is for one window). I just wondered if they were really worth it?

No one?

Clients of mine have bought them and are exceptionally pleased - one couple particularly, as required absolute blackout for a special needs child - nothing else came close - but bloc blinds were perfect !

Thanks. I might start saving then!