I typically only use media mail for 1 or 2 chips secured in cardboard, inside a bubble mailer. Any time I've used media mail they have arrived without issue. I haven't used media mail for packages over 3 ounces, anything that exceeds that weight goes first class or priority if needed. USPS has lost (or stolen, destroyed, etc.) A few singles in envelopes with stamps so I'd rather use the media mail option. I also ship from home through PayPal.