I have moved for the time being to 1 gallon brewing and have purchased 4, 4L kegs of this style. Not used them yet but feedback from members (there is a dark farm thread somewhere...) is good. possibly harder to clean than a corni keg but apart from that not seen any complaints. i have my first Demi john of beer to keg next week so will get some pictures up and my thoughts.
If you already have kegging set up, I would think this would be perfectly fine as any negatives tend to be about gas (canisters) or taps.