The Costco one looks enticing, I should check that out one of these days. Thanks

It seems the consensus agrees that Little Giant is better than the Werner-brand.
What's the highest height available? I'm assuming there's no multi-purpose ladder which exists that can raise up to 30+ feet, right? This time, I'm on a budget, but definitely want this investment to last a lifetime.
The biggest problem with the Little Giant style ladders is the slop/play in the rotating hinge mechanism when used as an extension ladder extended beyond the roof/gutter line.
If enough of the ladder is above the roof/gutter line, it is possible for the hinge mechanism to kick slightly out (away from the structure) and become unstable. The degree of unstable varies from unnerving to throwing you off if the user gets spooked.
The best way to avoid that problem specific to Little Giant style ladders is through using a ladder standoff like the Ladder Max to land the ladder on the roofline:
http://www.buyladder-max.com/
The Ladder Max is very useful in other applications, you can browse their website.
A 30' Little Giant ladder would be as heavy as a 30 foot 300 pound rated fiberglass extension ladder. Probably not the best combination unless you need a 30' extension ladder equivalent all of the time.
I hope this deal returns,
http://slickdeals.net/f/6517858-werner-22-ft-aluminum-telescoping-multi-position-ladder-115
I notice some of you mentioning the weight. Can't the ladder become lighter, since its multi-purpose (perhaps some components removed to make it more versatile), or does it always function as a whole (one-piece)?
If you are using it in a standard A frame configuration, the outer sliding part of the Little Giant can be removed. The part that stays together with the hinge lock lacks the flared base, so it will not be as stable.
Which size is the sweet spot for the typical DIY'er? I'm deciding between 17' and 22', now. The 22' may be a little heavier, whereas the 17' may be a little less stable (as you climb the stairs).
Thanks again.
For stairwell work, bigger is better.
A little Giant ladder allows safe ladder work that is impossible with traditional A frame ladders. Many people lean a folded A frame ladder against a wall, but this is quite dangerous because the ladder can kick out and you fall. The Little Giant can be set up to stand close to the wall.
The Little Giant also lacks the spreader locks, so it can be set up over some obstacles.
There are a couple of different grades of Little Giant branded ladders. The least expensive version is quite chintzy. The Werner, Husky and Gorilla Ladder knockoffs sold at big box stores are also quite chintzy.
Aluminum ladders are conductive and not allowed onto most commercial jobsites. The biggest danger comes from energized overhead power lines. If you maintain safe distances and work alertly, the danger is minimized.
Yes, there are rare instances where suspended ceiling grids are energized and a fiberglass ladder won't ground you out when contact is made positioning the ladder.
A fiberglass ladder will do no good if *you* decide to work on an energized circuit and get zapped on a ladder. You will be lucky and able to let go, or your body will convulse, kick the ladder out and contact will be broken as you fall to the earth. The fiberglass ladder will not protect you from your own stupidity.
Little Giant does offer fiberglass multi-position ladders. They are heavier than the aluminum ones.