Backup VDP appliance with VDP, a good idea ?

Hi, I'm using vsphere 5 with 3 esx V4

I'm testing VDP, as we can't backup on tapde the VDP data, I suggest to backup the VDP appliance (and data) with VDR on a CIFS folder. Then I will be able to backup this datas.

Do you think it's a good idea or not ?

Thanks.