Got a used one of these on ebay about a year ago. The unit seems well built and feels like it will hold up for years to come. The screen is a bit small, but the price was right. If you have not used mapping software before you might find this unit a little too complicated and I would suggest a ready to go unit from Garmen.
I bought my Mad River Explorer 16 about a year ago off of a Craigslist add. This is an older model Roylex and weighs about 80 pounds. It is manageable to car top and carry most of the time. This has been a great all purpose canoe. I've had it on large lakes and navigable rivers. The wind is probably this thing's biggest enemy especially when not loaded down with gear. However, I've never found it to be unmanageable. I've had five people in it short term with no problem (wife and three kids). I've gone fishing in it and find it to be very stable and with ample space to move around and switch positions. Glad I got this canoe and will probably never let it go!