One thing that I have found over the last few years reading this forum is that every member thinks their all-in-one system is the best buy. All have their strengths and all have their weeknesses and it is up to the prospective purchaser to decide which best fit their requirements.
If you exclude the high end offerings like Braumeister, Blichmann and the fully automated systems that mash, boil, hop, ferment, dispense and wipe your arse, there are a lot of competing systems, which appear on the face of it to be the same unit rebadged, but with different ancilliary arrangements (pump etc) and have the same controller, usually mounted near the base of the unit. The Grainfather stands on its own, pricewise and in specification, maybe that's part of its appeal.
It would be very interesting to find out how many of each of these units have sold, there have been one or two polls on here, which may give an idea.