I have oft thought after another episode of getting lost - 'Get a Sat Nav'.
After a day or so the feeling wears off.
A rectn trip got me lost in the maze of NE London and I really got searching - for a 'Sat Nav' that is.
I came across the this one
Tom Tom, for instance, are currently charging about £70 for 18 months worth of map updates, but the sat nav comes with a full set of maps. Had my Version 2 for about 5 years and been very pleased with it. I have only ever purchased one map update.
I still get free speed camera updates regularly for some reason. Will be testing it on holiday in Dorset soon.
I have an old Navman F20,which is a superb bit of kit, that usually gets me where I want to go (at least it tells me what road or location I am at). If you check the internet, there are websites that offer 'free' or low cost updates for certain sat-navs, personally I have only updated mine once, and that was a freebie update. I would also mention that Navman (which was bought out or merged with another company) offers great after-sales customer service.
A couple of suggestions to consider, is that I would get a larger screen, because 3.5 is now a lower limit, and if the eyes are not good, then the bigger size will help a lot. Secondly, don't be tempted to buy second-hand, because batteries might be a problem, which will add to the cost, if you have to buy a replacement.
If you want a demo, then try somewhere like Halfords, who have regular special offers on sat-navs, and will demonstrate and set-up the item for you.