Hello,
I read a great thread on this website about if the Hac4 was awesome or a total piece of crap. Well I got one and think it's pretty dope. If you guys want to see what the graphs look like I have a page where I have all of the graphs from my training rides in the boulder area. Click on the pics of the graph for a full size view.
Holokai
https://www.holotrainer.blogspot.com/

p.s. Yes I am slow and suck.

Those are pretty nifty. Can't wait to get a HAC4!

I've heard of some people having problems figuring out how to use the software. It only took me a couple of hours but I'm a bit of a computer dork. If you get one and have any questions feel free to email me.
Holokai

Hi,
I'm just a typical middle aged guy. Been riding a few years.
The batteries in my Polar are dead, didn't use it this year. To meet my goals for next year I need to start organising my training again.
So I'm gonna start with a new computer. What I would like is a coach on a handlebar. I have been thining about the Cateye OS1.1 and several others. I could get a HAC4, but it sounds like a bit more than I need, or want to handle. I was wondering if you had any idea of a good choice for me. You seen the Ciclosports that estimate watts?

The Hac4 estimates watts but I don't really use that feature as I'm focusing on heart rate right now. I don't know anything bout the Cateye. You can replace the battery on the Hac4 but I've heard it's a pain in the arse. I find that even without the software download the hac4 is a pretty good stand alone unit for doing intervals, audible beeps for HR zones and stuff like that.