I've been

for the 70-680 casually since August and I'm beginning to get comfortable with most of the objectives. It's time to sign up for the exam after maybe a 2 week study session of 2 - 4 hours a day, so I'll be looking at maybe no later than November 15th for an exam date. This is my very first certification exam (English CLEP doesn't count does it? lol... )
Is it worth it to get a second shot voucher? It's $135 right now here:
http://www.getcertify4less.com/microsoft-second-shot-test-pro.asp
For $25 less I could do the single shot early expiry

Is the 70-680 really that hard? I've seen many people on techexams talk about taking that exam and failing it. I'm really nervous and concerned about the waste of money if I failed.