Ok, so the ATC is in the lead!
So does someone care to comment as to why? I am going to purchase one of these two products. I can't see a large difference between them other than the obvious weight advantage of the Petzl. I personally have always leaned towards BD in most of my gear.

So what is the advantages of the BD?

6 of one, half dozen of the other.

Having sold hundreds of both, I've learned that most people pick one haphazardly, learn to use it and stick with the one they're used to

Theyve shaved out both, not just to save weight but also to prevent it overheating/help cool faster.

The Mad Rock Aviator is better then both of these devices.

6 of one, half dozen of the other.

Having sold hundreds of both, I've learned that most people pick one haphazardly, learn to use it and stick with the one they're used to

Ok, so based on the numbers pretty much staying even all along the way. I assume that both products work equally as well and it all boils down to what each individual is used to.
So I have decided that I will purchase the petzl. It has an added cost of $6, which is I take on another paper route, I can afford easily, but it has asavings of 29 grams, and I don't have to mess around trying to sling it in order to unlock it in a hairy situation.

Thanks for the input guys and gals, children of all ages!

It's a tube style device, there's not much difference in normal operation.

If I needed a device right now I would pick the Reverso because:
1) It's not made in China (yes, still not made in North America, but I'll take what I can get).
2) It comes in prettier colours.

Though it is $6 more at MEC, which could change my opinion when I'm actually buying. Hard to say, hard to say.

You didn't say what rope size you were going to use it with, but IME the reverso doesn't work as well on fattys like 10.5 or 11mm gym ropes. The slots are noticeably thinner than my friend's atc guide I've used a handful of times.

Over the last two years I purchased and used all of the guide type belay devices.

Black Diamond and Mad Rock are the only two that have the autolock hole in the correct orientation that easily transfer from raising to lowering, with out removing the device from the rope. The advantaged the Mad Rock over Black Diamond are
Cost: $15.00 vs $30.00
The slot is larger , so the rope feeds out smother, I have used in on 12mm rescue rope and is still feeds.
With the horn you can lock off devise with out tying a knot
I like the spring, but if you do not want it just take it off


Rick

So I get my package from MEC today, 20M of 6mm, great I can make my new cordlettes, one HMS Carabiner, perfect, I have a good solid biner for my Reverso, hey wait. Where is my Reverso.

Damnit! It's on back order. I have to go back to work next week, I was hoping to get out and practice on it this weekend :(

We do have a couple dozen in stock at the Burlington store... you could always pick one up and go climb on the escarpment.

That would have worked. I should have just run down there and got it all, but too late now. They didn't have any at the warehouse, so they have shipped it out in a separate package from the Toronto store.

You guys don's carry the Petzl Tandem Speed over there do you? I got a petzl tandem, but it's not rated for cable.

Logic bomb!!! : get it from the Burlington store now, and return the one you get by mail the next time you're there.

And no, MEC doesn't carry ANY cable-rated pulleys.

Umm, the one from Toronto will be here tomorrow.
I drive a Nissan Pathfinder outfitted with an extra 400Lbs of gear, it cost me $30 in gas to run to Burlington MEC and back to get a $35 piece of gear. I will just wait till mine comes in the mail.
I usually order everything online, unless its new hiking boots, shoes, clothing stuff like that I have to try on because of my odd proportions. So I am not in the store that often. Only been inside the store maybe 15 times in the last year.
Plus the local shop is pretty good to me, and carries some of the brands I like, so I try to be loyal to them when I can.