Excellent! Be prepared to donate time to the assembly. Time worth while spent. When you are intimately involved with the assembly you will understand the process and understand how the shed is water tight. There are many on sites on the internet claim the parts do not fit and the instructions need to be better written. 
While it is true that roof structure assembly instructions need to be a bit clearer and better drawn, you can do it. I would suggest better part identification of metal parts and better drawings, or photographs will augment the assembly. All of these changes would increase the cost, it would be well worth it. 

This is my second Lifetime product. I also own a large deck box. It has lasted eight years in the weather and it is still strong, water tight and the color has not faded. I presume that my new shed will do the same.
Lifetime Products are worth the cost. I trust the products and the products, I believe you can too.