I really like the TS-1000, (especially during the winter for the added heat). I have 3 and use them in a 2.7 x 5 ft grow space using 1 for each plant. Before then I used AutoCobs and achieved 2 grams per watt sometimes, but I couldn't get dense buds unless I was growing a strain like Strawberry Nuggets that have dense buds as a trait. Truth is I didn't know what a dense bud was until I grew the SN under the TS-1000. I had several cured buds that weighed over 1/2 zip. First time I used 5 gallon pots with coco/perlite, I pulled 33 zips from 3 pots, (including my personal best of 11 3/4 zips). I've thought about upgrading, but I really don't see no need until the ones I got decide to die!