"Level backups serve as checkpoints in schedules because they collect all 
the files that have changed over several days, or even weeks, into a single 
backup session." (a level 1 acts as an incremental as it records all 
changes every night. This provides 1) faster backup, 2) low load on server 
and 3) uses the least volume space. The issues are 1) slow recovery 2) data 
can be spread over several volumes (each level 1 since last full).

We have 2500 users and most recoveries are for files/file sets over 1 month 
old. We keep snapshots for a couple of weeks and most data is found there. 
We have no complaints and all is well..

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