Nothing at all to complain about and I've never really come across any complaints from anyone else, they do what they were meant for and then some. I would say sabretooths are more versatile for lower angle stuff but these are just as versatile for higher grade. Front points can be replaced which is nice when rock gets involved. Performance on snow is a lot better than I thought it would be.
Also, these fit my size 13 madrock mountains (35cm from tip to tail) without having to get the longer adjustment bar. If you have to order online without getting to put them on your boots in a shop then I thought that might help.
I like black diamond as a company and most of their stuff is great, but the mirage seems to need a second, updated, version. Manufacturing quality is a little lacking considering the price. Just like the other reviewer, I set it up inside first because I was too excited to go outside right away, and it didn't sit level. Stakes remedy this, but disappointing non the less. The fly is difficult to get right even after setting up the tent a bunch of times to get good at it. You can get the whole thing taut and then the door flaps in the wind, you can fix that and something else flaps. The fly clips to the body with little adjustable plastic pinch clips like you find on your backpack's hipbelt. This is cool, but if you step on those little lightweight things they might break, and they provide too much adjustability i.e. inconsistency. I think the shape of the tent is it's downfall. A good idea but it would be hard to make right without the tent being more expensive than it is, so considering this, black diamond did a good job. The main reason I am disappointed in this tent is the vestibule space. Being able to set your stuff out of the way of the door is a good idea if there is enough room to set your stuff there in the first place. The fly is so close to the tent in the vestibule there might as well not even be one. If you use this tent by yourself and only by yourself, there shouldn't be any problem. You could put everything inside with you in that case, but if is wet/muddy/dirty the inside of your tent will be too, causing it to not last as long. I could fit my size 13 boots and cooking stuff for the morning in the vestibule and that's it. With the door situated how it is one person still has to crawl over the other to take a piss. Minor annoyance, but an annoyance still. As for interior space, for one person it is perfect. For two it's tight but very doable, but you have to put your gear outside in the rain. There seems to be a lot of wasted space because of all the corners. Not very efficient. As for condensation, this tent excels. Air circulation is great, so if you hate condensation and you would buy anything so long as it does not have any condensation problems, this tent is great. Mild weather can't get through this tent either. I had it at 11,000ft. in rain and on top of snow at the same time, and it was fine. Just don't expect it to be perfect for every weather situation. I wish the fly came all the way to the ground, or at least closer to the ground. There are vents built into the fly so I don't see why there needs to be tons more ventilation by making the fly short. So, basically, I was not happy with this tent, I will be returning it to rei and buying something different, probably spending more, but if you are looking at this like a solo tent, I would recommend it to you. Especially for warm weather use.
I find that on most packs I don't use even half of all the little features crafted into them. If you are like me, get this pack and save yourself the time and effort of cutting off all the vestigial straps, pockets, etc. on others. The simplicity of the Khazri is a huge plus to me, and it makes mountaineering more enjoyable.
Also, this pack is super stable and allows a lot of movement when scrambling. This is cool, especially when you are on exposed ridgelines. Personally, I find it sketchy when my backpack flops to one side and almost pulls me off a cliff. That doesn't happen with this pack.
Finally, every size load seems to be just the right sized load for the khazri. It is very versatile. I have yet to overload it because it is a bottomless pit.
Update March 2010: Alright, I still like the stability and everything else I said. The fabric isn't super durable, but it's light so I don't mind that much. Mine is showing some wear, but for what it has gone through it's not bad. The versatility of the framing and whatnot is really nice. One gripe I might fix on my own is the lack of compression straps on the bottom; this makes it hard sometimes to get the stuff inside to sit where you want, but this is really only a problem if you don't fill the bag up all the way.