I've used them all:

The Capn - really poor user interface. Bad feel. The only people who like
it are the ones who've been using it for many years and don't know any
better.

Fugawi - very basic stuff. Not the best and certainly not the most
reliable.

OziExplorer - buy software from an American company or else support will be
a nightmare. OziExplorer is very similar to Fugawi in my experiments.
Again, not the most reliable.

Nobeltec VNS, etc. - the best. Best features and user-interface. It is
reliable. Also the most expensive. I don't think that their product
justifies the $500 - $1,000 cost any longer.

Maptech - good compromise between everything. Excellent support. Features
are good enough for most uses. User interface is pretty good. It is
reliable.

Transas, Raymarine, and all the others - not ready for prime time.


If you can afford it, Nobeltec is the way to do. For a more reasonably
priced product with great features and excellent support, you would be very
happy with the Maptech products.

Safety is the most important thing. Don't forget that!