I've been looking into getting a Video Cam for mountain biking for some time now. I've found a few options that I'm interested in.

They are the:
GoPro Helmet Hero
VholdR
V.I.O - POV1

There are things I like about the GoPro Helmet Hero...
The first is the price. At $169.00 this sounds like the first choice, however my concern is that because of it's size and how it mounts on the helmet, I'm concerned it may get ripped off my helmet if I get too close to a tree limb. It looks like a small digital camera mounted on your helmet. I've seen a couple of biking videos that where taken with it and I know that a handle bar mount option is not what I'm looking for.

The VholdR runs in at $349.99 and is more of a point and shoot type video camera. There is no way to view your video while on the trail with this device. But it does come with a set of lazers that help you get it's recording angle dialed in where you want your video to be shot. It's really light and is a self contained lipstick type video cam. I really dig how compact it is, the mounting options make it easy to mount in various locations and this is my first choice because of how compact it is and the price tag. I just wish there was a way to review video on site... but here again, I'd rather ride than stop at every turn in the trail to review the video I've captured. So this sounds like it's perfect for me.

The V.I.O POV1 really is one sweet video cam. It's a lipstick type cam, with a digital display, remote record button and play back features on the remote. There are some nice mounting options for the V.I.O POV1 too, but it's price tag makes it too rich for my blood, it weights in a bit more than the VholdR and it simply isn't an option, because I don't have that kind of cash to drop. But if I did, I'd get one.

One thing I that will be very important in my final decision is:
Ease of use.
Mounting options.
Price Tag.
Quality of video.
How rugged it is... will it hold up to the abuse I throw at it?
The features it offers.
But most of all... I don't want it to alter my ride. I want to turn it on, ride and forget about it until the end of the ride.

Now if I had the money, I'd probably get both a VholdR and a V.I.O POV1 so I could capture video from two angles... front and rear. That would be hooked up.

--------------------------------------------------------------
I don't remember...

I have a go pro camera, but mine is an older style that only has a wrist mount.  At the time I picked mine up they didn't have the helmet cam option.  Have been thinking about picking up the helmet mount.  I justified the purchase with the fact that the wrist cam is a pretty flexible thing.  The housing is waterproof and seems to be pretty durable so it can be used to capture video of the kids in the pool or in the surf.  Will be fun to play around with it this summer and see if I can catch some decent footage at the beach.

I mount mine on the handlebar with some foam pipe insulation.  The problem with the bike mount is that it shakes the camera like crazy.  If you take a look at the videos that I've posted you'll see that.  The helmet mount would definitely smooth out the video quality.

Video quality with the gopro camera is actually pretty good.  If you look at the original video clips the quality is much better than what shows up on youtube.  They really compress the videos down which makes the quality fall off. 

I tried to post a short clip that was actual size on the site.  Take a look at it - this should give a better idea of the video quality.

I'll post up a review of the camera with some pics so you can see how it works.

--------------------------------------------------------------
I don't remember...