I've got the NAVMAN 3400 and find it better than most in car navigation systems I've tried. The maps look good, the route planning is fast but thats probably because it tends to favour main roads a little too much. For road use it is generally excellent. However, there is no facility for off-road route planning or even giving you directions in the form of a bearing and distance to an on-road waypoint, so off-road capability is pretty much non-existant. I can't really comment on the Garmin offerings (as I only have a Garmin III Pilot for flying), hopefully someone else will be able to explain the virtues of these. The NAVMAN now comes with mapping for UK Austria, Belgium, Denmark, France, Germany, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Switzerland and Sweden. As with all Navtech mapping the coverage varies from country to country but I don't believe it is any better or worse with the NAVMAN package as any other package that Navtech supply. The mapping can be put on any available storage on the iPAQ (i.e. main storage, Plug in SD Cards, Plug in CF Cards) the GPS comes with a compact flash card slot built in but to the best of my knowledge does not come with a CF card (Worth checking with suppliers, I bought mine as a software only upgrade to the Compaq iPAQ Navigation System which uses the same GPS but different software). CF Cards are available up to 2GB now but reasonably priced ones are 512MB and under, and SD Cards are also available upto 512 MB. The UK takes just over 91 MB, France 118 MB. You could put UK Austria, Belgium, Denmark, France, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain and Switzerland easily onto one 512 MB card.