This is a very convenient, telescoping ladder. Collapsed, it stores a hundred times more easily than a conventional (and much more expensive) extension ladder. In use, it functions properly (at least when new), but has a number of (acceptable?) safety compromises which should be taken into consideration. 1) It flexes alarmingly while ascending or descending, because the side rails are not rigid, but consist of a telescoping joint every 15". This doesn't necessarily make it unsafe, but takes getting used to. I would be very hesitant to try climbing with the full 330 lb rated load. 2) The rungs are not canted to compensate for the tilt of the erected latter. Your feet are pointing downward at the same angle the ladder is leaning. Regular extension ladders have horizontal step surfaces when properly angled. 3) The bottom feet exert friction on the mounting surface, but also do not angle to account for ladder lean, thus you only get a point contact with the ground. Regular extension ladders have pivoting feet to maintain full ground contact. I'm keeping the ladder, but my contractor friend won't get on it.