I have only been using them for the latter half of this grow but so far so good. I went with Humboldt for the price and I like the Oneness as it is micro, grow and bloom all in the same bottle. I purchased my from
http://www.aghydroponics.com/Default.asp as they seem to be the least expensive and has excellent customer service. I also use their Sea cal and Sea Mag when needed.
As for the coco coir...I have 2 pj's in it right now that seem to be doing great....just waiting to see if they are girls or boys...