I've seen the Nano sets around for a month or two, but haven't picked one up until today. I've been pretty busy with our latest show, and recovery from that. But, I was shopping today and decided to try one of the smaller sets. I liked the look of some of the big sets better, but was turned off by the presence of a sound unit - I thought a lot of the value and volume would be that sound unit. Well, it turns out that the sound unit is very small - roughly a one inch cube, with a pair of watch batteries inside.
Overall, I was impressed with the general feel of care and quality of the set. The container has a sliding latch with studs on it, and the whole thing doubles as a T-intersection road display base, with the lid holding a backdrop picture. Included were a pair of short road sections, which can be used to join multiple bases together to make a street network.
One of the common complaints about Megabloks in general, by the Lego purists, is that the bricks are inconsistent, and of varying connection firmness. I found no such problems with this set (and I don't in general, with newer sets). The pieces are a bit bigger than half of regular brick size. There are 2 plates to a brick instead of the more common three. This set has a variety of piece sizes and shapes, and the usual (for Megabloks) spare pieces. It felt a bit strange putting those small pieces together (don't drop them on the floor!), but it went together well. I'll likely buy more Nano sets in the future.