Oh. My. Soul...These guys are next level. We tried some budget custom cards from another site, but they were low quality, crummy-laser-printed, mass-produced-lookin' cards, with the company's name plastered all over the card. Then we found Handwrytten.
Now we've got customized, high-quality cards with custom enclosures, custom signatures, so I can drop a birthday card with our own custom $25 Whole Foods gift cards at the drop of a hat. It also integrates with Zapier which takes this to a whole different planet. I can setup a customer task in our CRM which kicks off a custom card to the customer without ever leaving my CRM.
I used to spend hours each month handwriting birthday postcards to mail out, but now I spend about 15 minutes a month scheduling the cards for the month ahead. Need to send a thank you card? I used to get my phone to make a reminder to send it, now I use the Handwrytten app to send it right from my phone.
It is an investment, but it's so worth it. @davidbwachs helped me get up and running and they take great care of their customers. Can't recommend this enough.