Haven't read it myself, but from some other analysts/pundits, it may not be as big as some people think/want it to be (such as, while the dossier may have played a role in the application, it might not have actually been the trigger).

https://hotair.com/archives/2018/02/...aled-the-memo/
https://hotair.com/archives/2018/02/...ys-trey-gowdy/

On the other hand, big Dem/FBI talking points have claimed it would damage national security.
https://hotair.com/archives/2018/02/...security-memo/