Even though this thread is somewhat old I’d like to report about the Pifi Digi+.
I have one running on a RPi 2 for roughly a year now and it works flawlessly on Raspbian, OSMC and Openelec.
To me the combination of added IR receiver for ¹/₃ of a Hifiberry’s price definately cuts the deal.
Configuration is dead simple: Plug in the board, add 2 lines to the config.txt and reboot. The config varies depending on the kernel version.
On current Debian Jesse (=Raspbian) it’s:
dtoverlay=hifiberry-digi
dtoverlay=lirc-rpi:gpio_in_pin=26
On OSMC it’s:
dtoverlay=hifiberry-digi-overlay
dtoverlay=lirc-rpi:gpio_in_pin=26
On older Debian (Wheezy) and Openelec 6 it’s:
dtoverlay=hifiberry-digi
dtoverlay=lirc-rpi,gpio_in_pin=26
Mind the minimal, but crucial change. It is only a question of comma vs. collon, but it makes the difference between working and not. Took me a couple hours to get it right the first time. 
BTW my Pifi didn’t come with spacers, but the required large case did.