Would give zero if I could. 
Nice to look at but absolute nightmare as per other reviews! 
The runners don’t work. They feel light and cheap and have a forward lean on them so worried will fall on toddler if he stands against them. 
Paid for a fitter to come look at them, replace all runners and try to improve but he basically said they were naff and couldn’t to much. 
Contacted customer services and asked to pay for new runners but no responce