Once you get the hang of putting it... you have to read the instructions very carefully... it's a brilliant product. The great thing is that due to it's 25 years guarantee if you do go wrong and damage the poduct you can send back for a efund and order another. The only down side is that Amazon charge you for posting the item back. So that's not so good as you don't get your full money back on the product. But the Product itself is brill.