Of the three books I would rate Sandstorm highest, Frostburn next and Stormwrack last. Given my disposition for Norse flavor and cold climates I would like to rate Frostburn higher, but the book didn't much fuel my imagination while after putting down Sandstorm I felt like running Dark Sun for the first time in, what, ten years? I see the opposite is true for most people, that they prefer Frostburn- perhaps this is because the subject matter is more unexplored for them, I don't know. Either way, Stormwrack has not inspired me very much. It's not because the subject matter is familiar, because I've never run or played an aquatic game. I'd like to want to, in fact I bought Stormwrack thinking "this is it, my first step to an aquatic game", but it wasn't. Instead of the breakdown of how aquatic adventure is different I expected in the beginning of the book, I see information already in the core rules, variant aquatic diseases and poisons, a few pages on naval warfare and from there it goes straight into crunch. The problem with the crunch is that it's piecemeal, not enough for a game but meant to supplement your aquatic game. This is fine for a book about the cold or the desert but I need more to go on for an underwater game for which there's very little support. I kind of need more than some new dinosaurs and a reprint of swim-by attack. I didn't even think it was worth it to read the last 50 pages.
My review, such as it is.