Apart from all the other reviews regarding the VIP scheme which is a complete rip off. Do not fall for the express delivery either.
I paid £3.95 for 2-3 working days delivery and then informed that is business days only. Weekends don't count. So basically only worth it if you order on a Monday or Tuesday. Otherwise go for the free 5-7 days which is realistically 7-9 days due to every week having a weekend. Despite courier companies working 7 days a week.
Also feel free to call them and speak to someone very unhelpful in the Phillipines.
Beware of this company. Initial deal of 2 pairs for £35 good but make sure you call immediately to cancel the membership.