To Do KDP Select, or Not

I have been having a hard time making a decision.
So now... I come to you.

KDP Select
Have you heard of it?

If you an avid e-reader, or indie author, no doubt you have.  It is Kindle's newest platform.  Through KDP Select, ebooks are available in a lending library.  A fund is set each month, and depending on how many times your book is borrowed, you get a portion of that fund.  There are options to set your book to free for promotional periods, and Select helps to publicize your book more than before.

Sounds great!

I think the only downside is that if you choose to do KDP Select, you cannot e-publish your book anywhere but Kindle.

The only other location you can digitally get PN at the moment is Nook.  And to be honest, I make much more sales via Kindle than Nook any day.  It wouldn't affect me much in that way.  But I could lose some potential Nook readers.

So, should I do it?

As I said, I may lose potential Nook readers.  But at the same time, I could pick up many more Kindle readers in the process.  Decisions... decisions decisions decisions...

I am looking for your opinion.  Please... do share!