HEED vs. Perpetuem

Hammer's website says that HEED is designed for events less than two hours, Perpetuem for events longer than two hours.  I'm not sure how fast you'll finish a 70.3....

http://www.hammernutrition.com/za/HNT?PAGE=HOWTO&OMI=10135,10071&AMI=10135 

There is really good information on this over at the Hammer site:
http://www.hammernutrition.com/za/HNT?PAGE=ARTICLE&CAT=VEGGIE&ARTICLE.ID=1252 

I use my Perpetuem on long rides over three hours.  I like the taste and it seems to help me feel "full".  I like the ability to make the mix as strong as you want, because I am one of those people who doesn't do well on the Gatorade Endurance.

I use Perpeteum exclusively on the bike and for 3+ hour training rides.  This stuff is an all-in-one, so no gels, GE, endurolytes (unless it is really hot), etc. are needed.  You can get away with two bottles for the ride: one with a concentrated Perpeteum mix 3-5 servings and a water bottle to help wash it down.  The stuff tastes like an orange creamsicle and is good enough to concentrate the servings.  I used this plan in training for and racing IMFL last year and am using it again for my 70.3 next month and IMKY.  For the run, I find it more difficult to digest and I usually will/want to switch to gels and GE at that point. 

Just to echo what everyone else has said - Perpetuem is for anything over 2 hours. I, however, mix endurolytes in mine (I use the powder). I spoke with the Hammer rep last year when trying to figure out my nutrition issues and was told there weren't enough electrolytes in Perpetuem to use standalone, it's designed to be customized with the amount you need (based on your weight and experience). I use it both on the bike and the run (tris and marathons) for anything over a sprint.

I have used HEED in the past for shorter distances, but have recently switched to another brand. It's a great product though.