I like that they are able get you quotes from multiple shipping carriers, which makes it easier for me as an ecommerce retailer who uses many different vendors in my business every month (and with whom we don't have direct relationships).
It's not always easy finding out what your options will be each time there might seem something new about one or another carrier/vendor; however this service helps make sure things work well so our customers can shop without any worries when their items arrive back home safely after being returned by them overseas. Sometimes some products take longer than expected but nothing too major - just keep checking up regularly because sometimes shipments may change due to delays at customs etc., especially if goods were sent via air freight where everything takes much more effort getting cleared into certain countries compared to sea-shipped containers even though both would normally go directly across borders within Europe anyway.