Typically, the Areo bar is wide (about 8cm) and long (12cm for a medium bar), with an average height of about 1.5cm. The outer chocolate shell is moulded into short rows (seven in a medium bar), which are easily broken for sharing. The Aero Caramel breaks somewhat with that traditional, instead opting for a more modern long but upright and narrow bar style.
It only has five moulded, domed bite-size pieces, each of which are a hair shy of 2cm tall, and 2.5cm wide. Despite the relatively small shape, the Aero Caramel manages to clock in at the same weight as a normal Aero medium bar - 40g. The entire bar itself is 12.5cm long.
The outer chocolate layer is emblazened with the Aero logo, complete with bubbles coming off the O. The scent actualyl reminds me a lot of the old Nestle Double Blend blocks (RIP). It's quite sweet, and there's a bit of a warm hot chocolate note there. It's friendly and very inviting. It doesn't smack of quality chocolate, but this is Nestle we're talking about here. To be fair, it's a lot nicer than $2-shop compound chocolate. It is pretty rich and sweet on its own, though not teeth-searing as Cadbury.
Inside, the bubble layer runs along the bottom of the bar, and is immediately visible when a piece is snapped off. The bubbles are beautifully round and glossy, and they do look a little bit plastic-like (although not as much as the bubbles in the Peppermint version).
The caramel is stored under the domed top, and there's a thick layer of plain chocolate between it and the bubbles, which leaves a surprisingly small amount of the runny caramel. Despite its tiny size, however, the caramel has a huge impact on the taste of the bar. What was fairly rich and sweet just becomes obnoxious and very in-your-face. The caramel almost dominates the chew and demands your attention, barely letting the chocolate get a word in edgewise. By itself, the caramel is gooey and almost honey-like in its taste. There's no depth or notes of flavour though. It kind of reminds me of caramel topping for ice-cream - one-dimensional. There's a bit of sweetness, but surprisingly it's not too bad on its own. It's only in combination with the chocolate that it turns deadly.
I don't love it, but it's a bar I would pick up if I needed a serious sugar hit.