Blockposter.com

[QueBert]

Have an image I want to blow up super size. Was about to print out my Rasterbate of it when I stumbled upon Blockposter.com, does essentially the same thing but in a much different way. The few examples I've seen look outstanding, but I'm hesitant to print something 14x8 full color as it will eat up ink. I uploaded the image and compared it to the one I rasterbated, the Blockposter looked much different on my screen. For a photograph will I notice a big different? If anyone here has used Blockposter to do a huge blow up please let me know

thanks