As an illustrator, I'm a stickler for custom cards and promotional postcard mailers (at least I think it's still awesome to receive postcards in the mail), even with all the technology we have at our hands these days.
So! I decided to give it a go and got myself some round stickers(http://us.moo.com/products/stickers/) as my return-mailing address (because not many people have round return-mail address stickers, right?) as well as one-sided postcards to put into an envelope(http://us.moo.com/products/postcards.html). (enjoy my weird floral chair cushion in these photos)
Upon receiving my package, I have to say I really loved the package design everything came in. It was a really, really nice surprise. So many places I've ordered from I'll get my postcards or products just shoved into a box with a crumpled bit of paper for 'cushioning.' MOO actually has little cardboard envelopes for all of your orders, neatly labelled so I can grab them off my supplies shelf without freaking out about "Where the heck did I put it." ALSO, them being in 'lil envelopes means I can safely slide them out of the way when I need to get something else off the shelf vs. just a stack of cards that just falls everywhere (I swear I'm somewhat organized and not a slob-DON'T JUDGE ME).
The stickers are great, really crisp even on small text (and they gave me a few free random ones woo!). You can actually customize these stickers to have multiple images or words on them in one order. I chose all of the same color for consistency and branding but if you wanted multiple kinds of designs, the option's there!
The postcards came in really nice, vibrant colors, good card stock too (I'm using my Neverending Story piece and Failure/Moth/Butterfly piece). I personally prefer a sturdier card stock but I'm insane and like my stuff cardboard stiff; this is just a personal preference of mine. Honestly, if it were a harder card stock, the colors would get diminished, I'm sure. This worked out in my favor - so, really great colors, there's gloss on one side which I don't normally do, but again, the designs came out nice and sharp so I really can't complain!
So now I have my two promo-mailer cards stuffed into my own vellum envelopes, with my bad-ass rounded return-mailer stickers. MOO definitely made my stuff look more snazzy and the prices are decent. I'll be sending these guys out in hopes of getting some new clientele for freelance illustration!