I installed mine in less than an hour, the instructions were quite easy ... it will have the filter set, a holding tank, and the sink faucet ... you won't be using your present faucet for RO water ... but, be aware, they recover slowly ... mine isnt expensive, about $170 ... it is rated for 50-gallons a day ... the holding tank holds just under a gallon, and takes a little while to refill itself ... I've never timed it, but I would guess 20-30 minutes, at least ... ??? ... so, if you're planning on getting ten gallons at a whack outta your RO unit, plan on standing around waiting a long time ... I use mine for drinking water, only ... if you use it in growing, you will have to replace the calcium, magnesium, iron, etc., etc., because it's all been filtered out ... your RO water will be acidic, since the calcium was removed, it's not the watersource of choice ... I make a 30-mile roundtrip to fill my jugs from an artesian well, instead ... :smokin: