3Putt - just trying to decide between the 2.5+ and the 3.5LS. Does the 2.5+ have the exact same top as the 3.5LS, both are listed on the SM website as being 9"-4 ways. I love the look of the 2.5+, but its probably pretty close to 3 lb. If that's the case, why wouldn't you go with the 3.5LS if its only an extra half pound, has better padding on the straps, probably better material all around and more storage. Or is there something about the carrying experience that is so much better with the 2.5+?
Also, on the question of durability - I have a 3.5 from around 2013 which is pretty well bullet proof. All the new SM lightweight bags seem to have a lot more thin plastic, lighter legs and thinner material, which makes me wonder how they are going to stand up over time.
I found the 2.5+ to feel quite a bit lighter than the 3.5LS (which is still a great bag). I think the 2.5+ is closer to the 3.5LS material than the original 2.5, so maybe that's why the weight is also closer. As far as the top opening, yes, same size, same configuration on both the 2.5+ and the 3.5LS. To me I wanted the absolute lightest bag possible that could still handle a full set of clubs and all the things I consider essential on the golf course. For me the 2.5+ does it better than the 3.5LS especially on the days where I end up carrying 36 holes or more.
I can't speak to the durability yet, but I have close to 40 rounds on the 2.5+ and it still looks brand new.