Lots of people have a pot here or there with a copper bottom. They are not as popular right now as they once were, so if you asked me in 1985...I would be more concerned than in 2011 :)
Can you explain to me a little better why you want it, given it is not a common or majority choice? My guess is there are enough pros vs cons...which is why you want it...so that your agent can "sell it" as a plus vs a minus at the time you sell your home.
Some I can think of off the top of my head (though I don't know this type of appliance at all)
1) Greener Solution - uses less energy
2) A child or anyone for that matter is less likely to get burned on it
3) Fewer fire risks than an electric or gas cooktop
4) Less likely to but a plastic something on a hot service and have a melt down, if not a fire.
It likely has a lot of plus vs minuses. Get what you want...and make sure you are prepared to "disclose" the pros on your Seller Disclosure Statement. All too often a seller is told to put negative disclosures ONLY on what we call a "Form 17". In this case...spin it...disclose the unusual differences by noting the pros vs cons as an attachment to your Seller Disclosure Statement.
Most importantly...keep ALL material and manuals explaining it. You will likely want to make those available to potential buyers at time of sale. Having the REAL factual explanation from the manufacturer vs "seller said" will be VERY important at time of sale, both for your protection and the buyer's peace of mind.
I don't see it as much of a disadvantage over an electric cooktop. If you were converting a gas cooktop to induction, I would say no...don't do it. Lots of people who actually cook a lot prefer gas. But electric or induction? You can probably "sell" that difference.