This review is for the High Sierra AT-Go wheeled back pack which splits into two bags (I can't remember the exact model number though). I took bag this with me on it's maiden trip to the UK and offshore on an oil rig in the North Sea recently. It's really strong and surprisingly light. I haven't weighed it, but it feels like less than 5 lbs. I was able to stick my 14.1" laptop and A4-sized diary in it with a full change of clothes and extra underwear in the main section. I stuck my ipad and a couple other bits of clothing in the front compartment as well. I could quickly access both laptop and ipad when going through security lines at the airport x-ray machines. The bag has some very sturdy back-straps that I've used with the bag loaded at about 30 odd pounds. Trying to pull a bag on each side of you through crowded airports is always a challenge, so slinging this one on my back allowed me to move alot quicker, plus free up one hand to hold anything else. Although, the padding in that strap is not very thick, so it gets to hurting your shoulder after a while. Note - you've got the be in fair physical shape to take advantage of this feature, especially if the bag is loaded up. I used it as my carry on. The whole thing won't fit in the carry-on bag sizer when it's stuffed. However, the neat feature of being able to take the small day pack off the front allows it to fit in overhead bins. The day pack comes off really quickly. However, it is tricky to align the zip to mount it back onto the bag. One of the side water bottle pocket netting is letting go from the elastic, but that may be due to me trying to stuff too much of a fat bottle in there! Additionally, even though the main bag has a support for the front when standing, the bag tends to tip over to the front very easily with the day pack loaded. Some kind of fixed or fold-able kick stand for the very front of the day pack would help with this stability issue. I constantly had to lean it against something so it wouldn't fall over. For these somewhat minor issues, it loses 1 star. I subsequently used the day pack to go to the office, and it fits my pc, ipad and diary with odd bits well enough. Overall, excellent value for just over a hundred US$!