Absolutely terrible, supports my experience. They still have a package I imported in 2015. Luckily it's not worth much.
I've used Aramex Global Shopper since last year. Have had three parcels imported from the US since (all guitar stuff). They're not super quick (usually 2-3 weeks), but at least they are reliable and I can track my parcels. They also have a dedicated import duties section, which means I don't have to wait for them either.