Newbie with Nd-2500A HELP!

Hey I just brought the ND-2500a and I have a few newbie questions.

#1) Is it necessary for me to update the firmware? How can I check the current firmware I have?

#2) Is it necessary for me to install that bitsetting firmware?

#3) Is it true that this drive doesnt work well with Ritek disc?

#4) What is the best disc for this drive if Ritek is not compatiable?

Thanks for your help. It’s greatly appreciated.

Which is better, DVD-R or DVD+

Whats the difference?