We have some experience using Red Hat Satellite in an environment with ~120 servers. Now we're looking into deploying Ubuntu in parallel for the further growth.
How does Landscape compare to Satellite with regards to features and usability?
Linux – Red Hat Satellite vs. Ubuntu Landscape
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Best Answer
I think one of the main differences is the fact that in Landscape you cannot have off-line install, with your own servers, you have always to be connected to the Landscape servers...
Also, Satellite went open source, called Spacewalk, i would kill for an opensourced Landscape...
Anyway, there's a project for supporting deb files on spacewalk, but I don't know what status does it have...