Well, I got my dezl 560LMT yesterday afternoon, and I (mostly) like it. Some operating details are rather noticeably different from the way my Streetpilot 2730 works, and it's not nearly as configurable (at least at first glance), but once I figured out a few operating details, it's mostly set up the way I like. The manual (PDF) can be downloaded from the Garmin site
It has Automobile, Truck, RV and pedestrian modes. In truck and RV modes you can set up profiles for multiple vehicles, and name them yourself, and they're pretty straightforward, including dimensions and weights (axle max and vehicle max) -- you can choose whether to enter weights in tons or pounds (and another choice, don't recall what- kilograms?). Units are also selectable in many other areas, of course. So I've set up a profile for my Bounder with Toad and without Toad (I was surprised my Wrangler is just a hair over 12 feet long, measured by tape).
I was able to connect the dezl 560 to the Mapsource program I'd been using with my 2730, and I was able to easily dump all the routes and waypoints I'd been using into the 560 -- nice. Once I discovered that "more data" in one of the settings menus meant to display data fields on screen, then I had all I really needed. Altitude and speed are among the default data fields, both when following a route and when not doing so (I'd been concerned about how to get altitude). It's also great that when the dezl has speed limits available for your current location, it shows it beside your current speed in the data field, with actual speed turning red if you exceed that. BUT, if the GPS speed limit is wrong (you saw a sign saying different), touch the speed limit display and plus and minus arrows allow you to change the speed limit in 5 mph increments (it only changes the limit in your current direction). On my residential street, the 560 has no speed limit listed, but there's a plus sign displayed that let me set one. Nice.
The default voice is the same "Jill" voice that my 2730 uses, and it gives directions in a familiar way, but includes a written display (one line across the top) for some of the info, also, even well in advance of a turn. Driving a set route on the interstates last night was interesting (I used Automobile mode in my F-150). Southbound on I-25, approaching the ramp leading off to I-270, I suddenly got a loud DING, and when I looked at the GPS, there was a "photo-realistic" display showing which set of lanes to stay in for my desired route. There were a couple of other spots where I encountered that, also, but not at all road splits.
A very pleasant surprise when I was on my way home from my meeting, was that I didn't get a "recalculating: turn left on ... or make a U turn" when I didn't follow the directions. She ("Jill") wanted me to turn right, then onto a ramp to get on 6th Ave. eastbound, but I turned left on Kipling St., and the recalculation was silent, but almost immediately showed a new route in accordance with my turn, and she thereafter followed exactly my preferred route (not a stored route). Nice.
Since the 560 has a bluetooth mode, I enabled blue tooth on my cell phone, "paired" the two units, and was able to read my phone's address book on the dezl, and place a call, either type in number or select from the phone book. I didn't do this on the road, just from the garage, but talked briefly with my wife after calling "Home." DW said I sounded a little "hollow" -- not a surprise, given that it was about three feet between my mouth and the dezl. DW sounded good. This was all with the phone still in its case on my belt.
I've not yet driven my Bounder since getting the dezl, so haven't tried the RV mode. Pedestrian mode is also soon to be tried.
The friction mount is essentially the same as that on my 2730, and I really like it a lot. Also, while it's sitting in my F-150 and plugged in, I don't have to go through "I agree" screens every time, even get an almost instant power up.
All in all, I'm pleased with it so far. As I learn more, and as I get more experience with it, I'll update.