I'd give the base a 10+!!!!!   I wasn't real sure about which base to order for my umbrella so I reached out to your customer service department.  The representative suggested this set.  It's amazing!  I like that you fill it with water and not sand.  That way you can easily empty it and store for winter.  There are four pieces  so you aren't trying to lift one large piece.    To fill it you open the cap and put the hose in.  So simple!!!!  It's a nice sturdy set.