transform previous full backup chains into rollbacks

[avibs]

hello..
I have vmware with 2 host and nas "qnap" for backpup storage ...
every week my job do create a full synthetic backup and keep the full copy Take up much space and I'm supposed to keep 60 points back so that I remain free space to 60 points ..i found the "transform previous full backup chains into rollbacks"
What do you think Is it possible to use the "transform previous full backup chains into rollbacks"so then its keep only one full synthetic backup ..and what about the restore thats ok to backup This way ..
Basically what benefits this way and whether there are drawbacks ...
Thanks ....

[foggy]

Avi, please review this backup modes comparison and also this post for information regarding I/O load put by different backup modes on target storage.