The main reason for buying this set, and I suspect most of the Marvel sets, will be for the minifigs, as it certainly doesn't disappoint in the minifig department. As well as Iron Man we get Loki and Hawkeye, too. Loki's helmet is excellent and Hawkeye has what I believe is a new hair piece and a new style of bow.
I'll conclude this short review by saying the set has surpassed my expectations and I look forward to building the rest of the Marvel sets, which the postman kindly delivered this morning, on Good Friday of all days. Stay posted over Easter for more mini-reviews and photos!