Sticker shock is definitely a problem area. I must preface my opinion by saying I have not yet been on a trip, but will be on my first at the beginning of May. With that being said, my DW and I chose
Adventures by Disney for many reasons. The first is that we didn't have to do much research on the company since they are owned by Disney. That is a big plus for us. Another reason is that if you do it yourself, you can save some money (not a ton of it, but some), but you will have the headache of planning, researching, more planning, more researching, and more planning (get my point?

). There are other tour companies out there that have similar trips and they advertise to be cheaper. I found that once you start adding on their extra activities that are not part of the trip, the price becomes very close.
ABD also stays in very nice hotels that are centrally located, which is a HUGE plus when traveling to a foreign country. I found that not to be the case with less expensive trips. One thing that I've heard on this site over and over again and makes a lot of sense is that you are provided with 2 guides rather than 1, which is what is supplied by other companies. ABD has a bunch of little perks that I've heard about too. They will have water for you on the bus, where other companies say, you can buy it over there. Little things like that make for a great experience. One of the big things that convinced me is all the reviews on this site. I was able to see pictures and get descriptions of tours, where I couldn't find that with other companies. Even though we don't have kids, ABD has many activities for the kids aside from the tours and activities, which is a plus for the kids because they will have others their own age to hang out with and it is also a plus for the adults because they will have other their own age to hang out with and have no worries about their kids. Another big thing that helped our decision is that it seems like you experience the area you are at rather than just touring it. For example, you learn how to make pasta in Italy, you bike ride and kayak in Switzerland, you stay at a castle in Germany. You don't just drive by all these place and snap a picture...you live it (and take pictures too). It is a lot of money, but it could be a once in a lifetime trip also. I'm sure you will get more feedback because there are so many reasons to overcome that sticker shock and go on your dream trip.