Exactly! Easy-peazy, but I guess even simple solutions are too hard for some people to figure out. The reviewer suggests that owners will tire of having to do this "every time" they're hauling stuff and then be caught unprepared for a flat. But I think if you fill your bed with mulch, gravel or lumber that often, you should probably just mount a fullsize spare in the bed and be done with it.
Doesn't the spare, in the trunk, well isn't it on a sliding tray? My home depot is about 2 miles from the house so I wouldn't even bother with it. But let's say you are going to be driving an extended time with a full load in the bed. I'd just pull the spare, jack, and tools, and either put them in some part of the bed, or raise one or both rear seats and throw them in the truck "just in case."
It's really not that big of a deal. There are pros/cons to every design. Personally I'd rather my spare tire be in a trunk, secured from the elements compared to mounting one under the bed getting sprayed with all sorts of sheet 24/7. And keep in mind that journalists' jobs are to nitpick, and be an absolute critic, as they should. If they alert the consumer/buyer to +'s and -'s, all of them, then they are doing their job. People take reviews way too personally when it comes to items they have purchased. I'm more interested if it handles like sheet, drives like sheet, stops like sheet, and accelerates like sheet. Way more important than a spare. You should see a few cars I've looked at purchasing recently (Ford Focus RS, VW Mk7 Golf R), you don't even get a got damn spare, not even a donut. You get a can of fix a flat which can really F up your wheel. I'll take a spare, included with the vehicle purchase, anyway I can get it, mounted anywhere I can get to. Those 2 cars I referenced, the Golf R, you can spend about $400 buying a spare, jack, tools, carpet/foam, and make a near OEM solution. That car, in Europe, comes with a spare tire, in the USA it doesn't. On the Focus RS, the AWD system, specifically the GKN shafts and AWD unit (called a RDU, located between the rear axle or half shafts) takes up all the room so you have no place to put a spare, no mounting location. You'd have to buy one and carry it around in the hatch. So we should be glad Honda gives a donut, many mfr's are doing away with them to save $50.
There's an after market unit that can be installed in-line with the harness that connects to the back of the head unit which allows you to operate the navigation while under-way. I know I have it saved some where as I intend to install it in my RL.
You can do this with about any aftermarket Nav Unit. Just ground the mf'er. Some of them will even let you play DVD's while driving. Not anything I would suggest, but on a road trip, and the wife, or kids, wants to watch something, you can do it. Way more options aftermarket, just initial install is a PITA. Luckily a member here has already done and provided us with the blueprints. Just destroy them when complete or they'll self destruct