primary fermenters

Everything needed except grapes/juice kit to make homemade wine. Includes: 6 Gallon Carbon 5-6 gallon primary fermentation bucket (typical kit yield of 30 bottles) 45 bottle drying rack Hydrometer Stirring Spoon Corking tool 2 bottle cleaners Auto-siphon with tubing and clamp Wine agitator...

I was looking through the catalog by ECKraus and saw they had primary fermenters that screwed on, with a o-ring and a spigot. I was wondering if anyone had used these and if so were there problems and what were some of the advantages besides the obvious ones that were listed. My concern is...