Whilst the packaging perhaps left a lot to be desired, the presser feet in your set are of very good quality if you bought them from us: they'll serve you for a long long time! We take pride in finding and then offering great products at steep discounts. It's what we are all about! Your set is testament to that: near everyone loves it - aside from the packaging indeed.
...if you bought your set someplace else by mistake, the feet won't be of Madam Sew top quality. They may yet be adequate, though.
The only thing you really need is the new, amazing box, with the neat booklet, the DVD with tutorial videos, the snug placeholders (numbered as well), the images of all the feet... In short: everything except the feet, because you already got those!