I like the microprocessor controller and the information supplied by the TDS meter. The booster pump is a real need for me. I particularly like the low waste water as my water and sewage charges are quite high, this would allow me to increase my shower time from 2 minutes to 3, a win win for everyone.
Bonus 1, Bonus 2-all 3 (i was already following them everywhere), Bonus 5- haven't received my Partner Member Perks yet, but I'm really looking forward to getting a surprise Hippo Tang picture in my box...
But my favorite perk of all is contests like this!