Taken in order, Janie:
1. The stovetop smoker is just one brand of several using a similar design. I used to have one, but my exhaust fan has been on the blink, so don't do that sort of thing in the house anymore. And it got used so infrequently when I had it that it wasn't worth keeping.
Yours is sheet steel (as opposed to cast iron) and there's another thing to keep in mind: Because the base and the lid expand and contract at slightly different rates, the lid sometimes jams in place. Don't panic. Just wait a few minutes until everything cools down a little, and it should slide right out.
These stovetop smokers are OK for flavoring food. But don't expect to do a real smoke job with one of them.
BTW, you can easily jury-rig one of these smokers using a roasting pan, a cooling rack, and some foil.
2. The Slice Wizard is generically known as a V-slicer, and is a variation on the standard mandoline. Some have interchangeable blades, some don't. And all have safety guards, which should always be used.
V-slicers are said to do a neater job on many items (soft ones, like tomatoes, in particular) because the blades grab progressively from the sides instead of full-frontally. Mandolines of any persuasion are the most dangerous kitchen gadget going. Always use the safety guard, or you'll have fingernails (at best) or finger tips (at worst) as part of your recipe. One of the downsides to V-slicers is that they rarely (none I'm familiar with) have corrugated blades.
Did I mention you should always use the safety guard?
3. The Bonzai Chopper is a home-use variation of commercial french fry cutters. It's advantages: Everything comes out of it the same size, so it all cooks evenly. And, if you're making fries, or chopping onions, or whatever for a crowd, you can save some time with it. The disadvantage: Most people do not use it often enough to justify either the price (irrelevent in your case) or the amount of storage space it takes up. Frankly, most experienced cooks can use a chef's knife to make frys and the like just as evenly sized (or near enough to not matter). To me, this is an unnecessary gadget.
Which raises the issue: What is a necessary gadget? Excluding knives, one could make the case that no gadget is necessary in the kitchen. But, more realistically, I consider necessary gadgets as those which truly make the task at hand more efficient. They either help you do a better job or a faster job. This is balanced against how often the gadget gets used, and how much storage space it needs.