Was just looking at them on Amazon after reading your post. The pack is heavy at 5lbs and also concerned that the specs don't say what material the pack is made of. I also think that the zippers and seams may be an issue as well. Its hard to tell without seeing the pack and how it is stitched and what material was used.
Here are a few packs that are not really expensive that I would not be afraid of purchasing. In fact I have the North Face Terra 65. Pretty good pack but don't believe the 60 lbs rating. It would really suck at that weight. I wouldn't recommended for comfort going over 35 lbs. I had 40 in mine for a 15 male hike and found the fitting system and suspension was to weak for that weight.
Kelty Pawnee The North Face Terra 65 Jansport Klamath
Don't get me wrong none of these option are ultra light but there is no suck thing at these price points. Also to be able to use ultra light pack you need to keep the weight of you contents to under 30 lbs or so and that is not easy to do on a budget. Since this is referring to total weight including food and water.