5 year and still very happy!
I've used Depositphotos for about 5 years now and I've always been impressed with the service and value. I've just communicated in the chat on their website to renew my annual subscription and was helped quickly and efficiently. My only criticism would be that sometimes if you download graphics that you think will have a transparent background (showing a checkered grey and white in the image) it usually isn't so - and you'll just get a file with one layer. Otherwise vectors and other photograph type images have been fabulous!
