Quality zippers very questionable - Item returned and refunded

this backpack has just delivered myself, I have just returned (to be replaced by another model from a different manufacturer) because of a faulty closure of the upper pocket ... It's a shame to especially since I already had the same since 2.5 years and that it is degraded (daily use) only recently (strap). Maybe a little too soft, it was perfect for my ultraportable 13.6 ".
As I do not want to risk a purchase to return again, I bought the Belkin F8N159eaBR model, more expensive 18.64 (also in PREMIUM), which seems more solid and I enjoy very favorable opinions (in the light of positive feedback among the 60 rated).