I was looking for a lightweight daypack of about 25 liters that could be stowed easily in a larger backpack and I had high hopes for the scramber. Its high-level characteristics were right but the execution not as much.

Removing the frame sheet to compress or lighten up the pack is not practical: The removal slit is half way up the back of the pack, not on the top, so the sheet needs to be essentially folded over to insert both its ends first, which is cumbersome and it makes me question its longevity. Do not even think of removing the sheet temporarily to sit on it without emptying the whole pack first. Further downside is that the pack outside material between the frame sheet and someone's back is just a mesh so without the frame sheet the pack back is no longer water resistant. The water will run through the mesh and then through the internal sheet removal slit straight into the middle of the pack.

The main hexagonal clasp is another problem: On the pack I had in my hand the upper webbing loop for the clasp was made so tight that it was difficult to get the clasp through. Trying it with cold, numb fingers would be a challenge.

If your looking for a decently solid pack look no further than the Trad pack. Pretty comfortable suspension, tight fitting pack that doesn't move around when your running away from the smokey the bear rangers determined to ruin your day. One thing I wish it had were loops on the bottom for a sleeping pad, but the compression loops on the side can take care of that situation. Durable as all heck... I don't really have a huge issue with the straps, they seem beefy enough for me altough I rarely load more than a few layers, kitchen set & water. Hip belt is a little lacking... I don't regret buying it,

I got the Scrambler for free with a MH down jacket(which was already on sale). I have used it on day hikes, as a summit bag, taken books to class in it, but mainly use it to haul extra gear/clothes that might be needed but will most likely stay in the car. The straps are flimsy, the bag becomes more of a cylinder when full(even with the backplate in), and the lid is difficult to get into if you have a "heavy" object in it. For getting it for free, and for being one of the first in this type of category, I have found uses for the bag. I prefer not to hike with it as I have become fond of ventilated backs on packs, but this will be hauling clothes for after hikes for years to come. Again, this is for the older style of the pack. The new style looks to have improved on many features but keep the same weight.
With the straps not being meant for heavy loads, its best to keep it light(~10lbs), otherwise the straps dig in to the shoulders. If you are carrying a water bottle and a jacket with some snacks, this would fit the bill. But $70+ is asking a little too much for what this pack can do. OR has a waterproof version.

Super light bag, pretty durable, Quite a bit of space, and very easy to adjust everything.

The shoulder straps are wicked small, and dig into your shoulders alot. If you're planning on wearing this pack for more than twenty minutes, you wont like it very much. If you can, get something else.

I was unfortunate enought to have purchased the old design Scrambler pack about 5 months before the new design Scrambler was released by M.H. The old design was pretty bad. The shoulder straps were so flimsy and light, it felt really awkward on your back, very unstable. I never packed it with too much gear, just the essentials for a side hike or summit push, but it just didnt cut it. The new design considered many of the old design flaws and it is much better now. For one, it has a thin waist belt which helps keep the pack in place. Second, the shoulder straps are much better, with added padding and wider from side to side. And now, instead of just a foam backer, they added a rigid plastic along with the foam backer to give the pack side to side rigidity. It will still flex up and down, but the plastic backer gives the pack much more stability to carry a little weight. A rediculous amount of bungees on the outside make it possible to strap some gear, but i wouldnt push it with how much weight this pack can carry. 15 pounds maybe.. All in all a great summit pack or daypack with versitility and much improved from the previous model.

I recently took this pack for dayhikes to RMNP. I had all my gear in a much larger backpack but for the day hikes, I pulled this out to carry extra layers and water in a Nalgene.
It is not the most comfortable backpack and even though it has lots of room, it is not meant for carrying anything that is too heavy (like the previous reviewer says, the straps could dig in).
However, I like this pack because I don't have to carry two backpacks when I go on a trip. I keep it in my larger backpack until I need it to go on a day hike.
It's durable enough but it's not waterproof so be sure to have some sort of cover if you're expecting rain.