We recently ran tests of SQL Litespeed, SQL Safe, and SQL Backup. I found minimal differences with compression and performance of the 3 products. I could not find any justification for the higher cost of the SQL Litespeed or SQL Safe products when compared to SQL Backup. The yearly maintenance cost alone of SQL Litespeed or SQL Safe was higher then SQL Backup including support.
We run this on a couple of clusters, and Red Gate has a version that supports clustered environments without problems.
SQL Backup 4.0 is due out soon, too. And, I was told that we would get the upgrade from SQL Backup 3.2 to 4.0 included with our year of support/maitenance.
SQL Backup has saved us time, disk space, and thousands of dollars.