I come down somewhat in the middle of this. Most shops charge between $50 and $200 pp extra for a trip over what you can typically do it yourself for. They also get 1 free shot for every so many people. Typically it's one free room space for every 9 travelers, some more and some less, some includes the diving other don't. Is it worth it, yes and no. Setting up the trip is fairly easy once you have done it a time or 2. I set up trips to Boniare every year and it takes all of 10 minutes to do initially (most of which is friendly banter and greeting) and then a few more calls or emails as time goes by. The LSD is not on the hook for much money either, at least not at the resort, air may be different I never arrange that. It cost me $500 TOTAL to set up a trip to Boniare next April to a major resort, rooms, diving, rental car and breakfast. For the $500 I get to hold as many spaces as I need (I am presently holding 30 spaces). I am getting 1 free spot for every 9 divers that go, the value of which will be spread between all who go, maybe a $50 price reduction. I can add or drop spaces up until 60 days from the trip at no cost to me so I am not on the hook of any money other than the $500 (since I am going, that is just my deposit anyway) as long as I get the room count (and money from the divers) correct by the 60 day limit. I don't consider the "there are instructors going along so you can get more training" to be of any benifet unless you are a new diver and just feel better having an instructor you know along. Sure you can do more training with an instructor you know but at least all I have see also charge for the training so there is no added value. You can just as easily do it back home and not waste valuable vacation time doing it or just pay the instructor there to do it.
Is it worth the extra for a LSD, IMO yes and no. If you have never been to a specific location or want a no effort trip then yea it's most likely worth it. I also like traveling with a group, it's just more fun IMO. On the other hand if you have been to a location before and already have a group then no it's not worth it. I can save $100-200 pp by doing it myself and once you have set up one or 2 its usually fairly easy to do.
Is it worth the extra for a LSD, IMO yes and no. If you have never been to a specific location or want a no effort trip then yea it's most likely worth it. I also like traveling with a group, it's just more fun IMO. On the other hand if you have been to a location before and already have a group then no it's not worth it. I can save $100-200 pp by doing it myself and once you have set up one or 2 its usually fairly easy to do.