I have used both and the advantages of the angled outweigh those of the straight. For inexperienced glassers, the straight are a little easier to line up initially. With a little practice, this quickly becomes a non-issue. Many on this thread said that they prefer a straight for looking out of a truck. I feel the exact opposite. Sitting in a truck seat, looking 90 degrees from my natural seated position quickly becomes a pain in the neck, literally. Rotating the barrel of an angled scope makes this much more comfortable! As mentioned before, for long duration glassing, it's much easier and more comfortable to move the scope around and stay in the same position, than to continually change positions to follow the back end of a straight scope around. Casual glassers may be better served with straight glass, but if you spend hours behind your spotter, do any digi-scoping, want a shorter/lighter tripod, want less neck strain, do yourself a favor and get an angled scope!