[Yaffs] Disadvantage of using yaffs checkpointing?

Hi All,

I am very new to mtd & yaffs and working on boot-time optimisation and
found that yaffs check-pointing helps to mount yaffs2 very quickly.
I tried it, and was able to save almost 4sec for 128MB partitioned nand.

Since everything looks very good If I use yaffs check-pointing feature
but have a doubt, are there any disadvantage of using check-pointing
by default in final product?

I understood that, check-pointing only disables boot time nand block
scanning & marking it bad if found, and takes "system snapshot" while
using "umount /dev/mtdblockN" which it use in next boot.
So, If I decided to use "check-pointing" with "umount" while powering
off the device in final product, are there going to be any problems
I will face avoiding block scanning?

Thanks lot for any help.

Thanks and Regards,
Shivdas Gujare