It's a decent tank if you plan on going for a nano. If you can, i'd really suggest getting the biggest tank you can get your hands on. Much easier to take care of b/c of the water volume. A larger tank also opens up the possibilities for more types of fish.
Have you decided what type of system you want? fowlr
, reef? What type of fish you want to keep?
If you decide that you want smaller fish/fish that will do fine in a 29g; then that tank is a good buy.