Now that I've had a chance to use the 5510, I have to tell you that one gets the distinct feeling that sometime in the not too distant future we won't have to look out the front wind shield to get where we are going......we'll just look at the GPS and drive.
Ok, so there are a few bugs they still will need to work out. Like our first destination was plotted to the wrong street

. I later surmised that this was due to selecting the RV park by the icon provided (among the other 15,000,000 other points of Interest provided by Rand McNally) in stead of putting in the address, and it just so happened this RV park was closer to 16th Street than 8th, the later being the entrance street. (Hey, it IS a GPS unit.) The good news is there is a way to inform R McN of errors (so they do care.)
The misses was a little less than impressed with the voice quality. And, while she wears a hearing aid, I have to admit, it was somewhat scratchy. (I told her she was just jealous because I was the one that heard the voices. - That's a jo, ah say, that's a JOKE, son !) I haven't tried the other voice that's available.
I was impressed with the amount of data provided by the tool. I was able to help out newly made acquaintances we had wine with one evening. They were from Holland and wanted to know if there was a good place to stay close in to Victoria BC, as well as up by Tofino. Not only did we have the information, but we could provide phone numbers and map out their route in two minutes. (Otherwise, he coulda been busier than a centipede at a toe-counting contest.)
I don't know why a Mercedes Sprinter would not be equipped with kilometers per hour on the speedometer, but no worries....I just switched the 5510 to kilometers and it told us how fast we were going in kilometers while in Canada. As we zipped under bridges, the cross streets were indicated, even though they weren't germane to our travel plans. I'm not quite sure how it was able to detect our progress while we were in a tunnel (perhaps by our speed entering ?)
In the US (but not in Canada

), it not only told you how fast you were going, but it also told you of upcoming speed changes (you determine how far in advance). If you exceeded the speed limit (again you determine if you want this feature and by how much over the speed limit) it let you know by verbal warning - and not repeatedly which could have been annoying. I was impressed that they had up to date information on the road work being done, as well as temporary speed limit changes. How do they do that ?
I still haven't figured out how to get local traffic conditions as it mentioned in the brochure. Got caught at the Canadian US border for two hours - (I was doin a whole lotta choppin - but no chips were a flying.)
Other notable options were: to plan your route without U turns, which could be handy for you Diesel Pusher folks or those with fifth wheels; To avoid toll roads - hey that could get expensive on places like the Penn Turnpike where they charge by the Axle if you have a dingy; you can change map orientation so that North is always up, or 3D, or so that forward was always up (my directionally challenged misses likes this one the most);
With a click of an icon while traveling - you can see what's on the next exit - in case you want to find a Starbucks or someone had GOT to have dinner out; and if Fido ate a leather glove (that boy reminds me of Paul Revere’s ride – a little light in the belfry – heh heh) - no worries - you'll be able to see where all the vet hospitals are on the map as you drive along; or maybe the vehicle is acting like a dead horse – no get up and go – Well, all the local RV repair shops will be at hand .....and this is just to name a few of the things this tool can do.
I found the layout to be a little difficult at first, but logical once you start to use the various things the 5510 can do.
And, yes, you can Geocashe with it. Battery lasts almost two hours without having it plugged in. I'll continue to report if anyone's interested....(That boy's got a mouth like a cannon, always shooting it off! )