I love printing photos. I know I'm in the minority because most people just upload photos to Facebook or Instagram and they exist digitally only. But I love physical photos. I love to hold them and enjoy them tangibly.
And I know photo books are all the rage, and they're cool and I really love them, but you can't put a photo book in your wallet. My dad always had a wedding photo, plus photos of us kids, in his wallet. I haven't seen his wallet in a long time, but I'm pretty sure they're still there. And that's amazing and sweet -- and something you can't have if all your photos exist on the Cloud.
I recently printed 100 photos from MailPix.

The process to order photos is simple. Upload your photos (from your computer, phone, or social media pages), choose the quality of the upload (express is for 4x6 prints, fast is for 8x12 quality, and large is for posters and gifts). The photos will then be available for you to choose to print. The default is one, but just click on the plus sign and you can increase the quantity. I didn't see a way to increase the number of prints without pushing the plus sign. That would be helpful if you were printing 100 of the same photo.
I placed my order on a Wednesday and they were in my mailbox on Monday. That was standard shipping. You can choose two-day or overnight shipping if you want to pay more and need them quicker, but I was fine with five days (which included the weekend).

The photos arrived in two envelopes inside an envelope. My photos arrived in really good shape too. Nothing bent, torn, or tattered.
And the color on them!
They're so bright and vibrant. The quality of our photos was really high (you definitely get what you pay for; that's one of the tips in my five tips to hiring a wedding photographer post) so it's great that the quality of printing parallels that.
They're printed on Fujifilm, in case you're wondering, and they're glossy. To me, that means that when I'm flipping through the 100 photos I printed, they slide easily. I can just glide through them quickly. Although, if you know me, you know I'm the slowest person when it comes to looking at photos because I start in the background. I'm always looking to see what is happening behind the photo and where it's taken before looking at the photo itself. I started doing this way before the days of photobombs, so it's not that I'm looking for someone popping out where they shouldn't be. I just like to look to get a feel of the photo first. That's part of why I like looking at actual photos, not ones on someone's phone. You can't stare at someone's phone long enough to get the same feeling (if you do, you'll probably get interrupted by a text, have to hand the phone to its owner, and you may never get it back to finish looking at the pictures).
