I like it more than I thought I would because it's less of a PITA than I expected. But there's really no comparison between it and either of the Picobrew systems.
Grainfather can. But I don't find the small batches on the Picobrew products to be a limitation because it's so easy to brew more batches.
the issue I see is that packaging in kegs is well suited to 5 gal increments. there is also still the same prep that is required for any brewing system. measuring the grains, hops, treating water, etc. for me 5 gal is kind of a bare minimum for my efforts.