If real life didn't get in the way, I would have gotten my hands on this set earlier. Now that life is a lot closer to normal, I had the chance to hunt for this at Divisoria. I got mine for PhP 750 (US$16). Others are selling it for as much as 60% more.
The tower looks good from any angle and can be opened up like Polly Pocket houses. The first floor has the sick bay and the Iron Legions (a symbol of how the idea of being the world's saviour can easily be corrupted) deployment area. The second floor has the lab with Loki's scepter being analyzed. It also has the assembly/repair room for the Iron Legions, which Ultron can use to rebuild himself.
The "glass" panels on the first two levels can be opened to allow the minifigs' entry/exit. On the 1st level, the panels are hinged while a lever is used to "blast" open the glass panel on the second.
There is a lounge on the 3rd floor with a viewing deck aside from a control room. The floor of the deck can be opened apart to simulate being destroyed or getting ready for battle with a couple of hidden shooters underneath.
The lounge has a secret compartment for minifig ammunition. This is perfect for Black Widow. The Black Widow and Hawkeye minifigs are not included. I just thought those rooms have been designed with them in mind.
The top most part of the tower has another pair of shooters. It also houses the drone, you know, similar to the ones they regularly use on terrorist regions even is there will be a lot of civilian casualties but they don't really become trending topics. I digress.
I kinda like this set more that the Quinjet. Maybe because I can play house with this set. What more can you do with Quinjets anyways aside from bomb places?