I've climbed in them for a season, and am a fan. They do thier job, and are very nicely adjustable. The convertable and customizable front point configurations are a plus, as is the easy getting of spare parts. Very similar to the offerings by Grivel, my buying decision was based on price (Bionics were on sale, cheaper than the Grivels by a good margin).

I'm a fan of these leashes. When bound correctly via the hose clamps, the main risk associated with these leashes - accidental unclipping - is pretty much nullified. It's great being able to unclip from the tool without wrestling with your leash and firing in a screw. Only reason they get a 4 is because of the price.

I'm a big fan of the Rages for many of reason people have listed above. Interchangable parts, great value, and versitility. The pinky rest can be both a curse and a feature, sometimes I appreciate it to improve grip on the tools and othertimes I curse it for not allowing me to grab the tool as low as I'd like. It's a heavier tool, but again, this can be both a good thing and a bad thing, depending on the route and your style of ice climbing. A solid buy regardless of skill level.

Looking to get into mixed climbing, I picked up a cheap pair of these. Of course, they possess the typical advantages and drawbacks of leashless tools, so I won't discuss those. It has a solid swing when swung from bottom grip, and a rather compromised one when swung from the upper grip, but that is to be expected. One drawback I've noticed is the lack of a proper rest above the lower grip to place a hand on when matching, instead you have to really squeexe the shaft or put torque on the tool by grabbing the top of the lower grip. I know some have been able to screw on such a grip, but I've not used a Scud like this. If you have or get a pair of these, you might want to wrap the things in some grip tape (skateboarder's deck tape is good). They're worth the price I paid for ($75 each used) but were I to get a new pair, I'd go for the more modern offerings.

Just bought a pair as a specialized steep/bouldering shoe. I'm a hard core Miura fan, and found these shoes to be of a similar fit (of course, they're cambered more and such). They run large, so buy a few sizes down from what you normally get from La Sport. I'm a 40 Miura and a 38.5 Cobra.

As for performance, I'm a fan. Power is focused into the big toes, allowing superb footwork on steep terrain. The heel slips more than I'd like, but not significantly more than any other shoe I've used (laced or unlaced).

Of course, this is a specialized shoe for steep face climbing. I still use my good old Miuras for slabs, cracks, and not-so-steep faces.