I've been using 7-zip because that seems to give the best compression, but I seem to remember Maurice recommending WIM because it would take advantage of dedup on the DPs.
Worth it? I think my highest priority would be speed of download and processing during imaging.
I have been using WIM mainly because WIM is supported during OSD. We were not using compression before and had issues with downloading driver package during OSD which was taking hours.
I've been using 7-zip because that seems to give the best compression, but I seem to remember Maurice recommending WIM because it would take advantage of dedup on the DPs. Worth it? I think my highest priority would be speed of download and processing during imaging.