We just got back from a Disney trip where we used Mouse Expedition for FastPass running on an extremely busy Saturday (10/6.) By the way, there was no offer of, nor would I have accepted, any "line holding." We had great Fantastmic seats, got Fastpasses for all but two rides in both parks (and those only because they were down), and did 27 rides total, all without waiting more than 30 minutes for anything (and that was Jungle Cruise). And we did all this while also having a leisurely lunch and swim break midday. It was the most productive day, by far, we had in our week-long trip, including those that were far less crowded. While we rode non-FastPass rides, Brian went from park to park collecting FastPasses and periodically checking in with us. (We had already been in both parks when we met up with him at DCA on a non-EMH morning.)
As for Fantasmic seating ... Now that I've seen it at
Disneyland, not only does Disney allow place-holding with blankets/tarps in the quite small lower area, they guard and defend them. Not letting people WITHOUT saved spots into the area at a certain point and removing people who aren't with the saved groups. When we arrived at about 8:15 PM, Brian and his girlfriend had, had the spot saved since before 6 PM and were front and center for the show and the following fireworks. We were amongst an entire field of people doing the exact same thing and there were many cases of 1 person holding a spot for a lot more folks (4-6 was most common), so it was hardly unusual. Plus, we still waited 45 minutes for the show to begin.
Frankly, I have zero problem with Brian's business model (which is kind of genius), but can't believe that Disneyland actually allows all this place-saving and holding, blocking off whole areas of the park to make it happen. Weird.
As for the "is it right?" argument ... If you think it's immoral to pay a FastPass runner or someone to save your spot, don't do it. I, personally, consider myself a very fair person and had zero problem with it. We broke no rules and I didn't feel we were "cheating" the system in any way, just using a third-party to get the most out of our day. Everything he did, we could have done ourselves, but it would have meant one member of our party missing out. That's where the payment comes in ... What Brian did for the day isn't exactly fun. For us, it was worth the cost to make our vacation more enjoyable.
We also did the dessert seating for Fantasmic on another day (my son had fallen asleep just as the show was starting the first time we saw it) and, in some ways, our view was better down below--for things like the pirate ship battle--and others I preferred the actual physical seat and raised viewing angle the dessert seating provided, even if we ate almost nothing from our boxes. (Though I did like them bringing us sodas and water.) We did not line up super early for this, though my husband did do it while my son and I rode pirates. We got front row on the far left side and returned to our seats a little bit later than the seats Brian saved.
I would highly recommend Mouse Expedition. Yes, it's all stuff you could do on your own, but having someone else to help out really made our life a lot easier. I'd use them again in a heartbeat.