If you have a city select stroller, would this be beneficial to have?

It's an attachment that allows you to use your city select seat as a high chair that attaches to the table.

http://www.buybuybaby.com/store/product/baby-jogger-reg-city-select-reg-hychair-in-red/1040307466?brandId=440

Just curious if this is a good idea.

Unfortunately, I don't think it's part of the 20% manufacturers sale that is going on.