I was a peer reviewer for the first issue of it and would defineatly recommend it.
I have 2 warnings though -
First, it has a lot of information, so may look overwhelming to start with. It's best to start out in small 'doses' to avoid getting overloaded.
Keep in mind that there is some stuff in there that you may not need - like all the resort stuff if you have already decided which resort you are staying at. Knowing what you DON'T have to look at helps.
Second, at first reading, you may feel like underlining everything because everything looks significant. If you do that, you will have so much underlined that it won't be helpful at all. So, I would suggest first skimming thru an entire section that you already know something about. If there are things you think you will want to note, Post-it Notes or Post it Tabs are good for temporary marking. After you have read a bit, you will start to see some patterns and may find that you don't need all those things marked any more.
So, I would go thru several times before actually marking anything.
Also (I guess this is #3
there are things listed for specific conditions (like autism) that may be helpful for other conditions too - For example, they may have stairs marked for an attraction for someone with mobility issues, but you may have a child with autism who balks at stairs. So, my suggestion is to look at the information for all conditions to see what else might be helpful in your situation.