Are there any niggles with Prerender? Wrt SEO

I have been told Prerender is the way to go, in my previous post.

All I wanna know is whether there any Niggles, Shortcomings on this part? Something we have seen in past with all SSR solutions. Something we might have seen with Spiderable/PhantomJS etc. & also on other platforms.

How good is, mdg:seo? Would you rate it:

a) Somewhat lacking?
b) Average? But without issues.
c) Good. Without any issues, what so ever.
d) Excellent. Butterly smooth always?

Please guide me. A million thanks in advance.

Best wishes & warm regards from India, & the Hindi Heartland.