I have bought Garmin units for years, both in car and handheld units like this.
The new Etrex is a very nice unit. The display is better than the old Etrex, battery life is better and overall its smaller. The menu system is different and takes a few extra clicks to get to the screen you want, but overall it is a worthy upgrade from my Vista CX.
The only thing I don't like is that the joystick is now the other side of the screen, making left handed / left thumbed operation difficult. You either cover the screen when using the joystick or learn to use it in your right hand.
Now, all Garmins in-car units have superb mapping, far better than the competition. So, why are the base maps supplied in handheld units such utter rubbish? Unless you are happy walking looking at a blank screen, you are going have to dig deep in your pockets and buy some sort of mapping to install.
You have a choice. Birds Eye maps look a great idea, but the area you get for £20 or so is tiny. 600SqKm sounds big, but it isn't. And, be very careful when you do order Birds Eye maps because if you don't download and buy exactly what you want first time, your stuck with it. I know! They are also quite poor to look at on screen. Not nice and sharp, but a bit blurry. I kept expecting the image to snap into focus, but it doesn't.
Then you have Garmins TOPO maps, which are good, but expensive and the Discoverer range is again good, but expensive.
But, there is another option. OpenStreetMap. Its free, routable, and is similar to Garmins TOPO maps. Search for them and download one to a micro sd card. I have the whole of GB on a 2gb card.
So, now there is no excuse not to get a nice shiny garmin handheld and when you do, you won't be stuck with inferior built in maps or expensive add ons.