Vinyl Storage Solutions review for ShipStation

I've been using shipstation for about 3 years. While works well, as you grow you see it's limitations quickly. I went from 3 shipments a day to 60 and I can honestly say, I'm not impressed. Lacking features: 1. doesn't automatically pick the lowest shipping rate if you have multiple courier accounts; 2. fails to pick up HS codes for international shipping; 3. may not pick up sale prices and country of origin for customs. Those are my 3 biggest pet peeves.