[yanivf]

from my experience, there are several VCs that actually can smell a good or bad idea "a mile away" and it usually works for them (at least by their returns). But the main thing you need to consider is that most VCs that invest in an early stage do check your idea, but they care a lot more about you and your team (since your idea will probably change a few times during the process).

While it is acceptable to "shop around" when you are looking for funding, it usually doesn't look good if you start "shopping around" after starting a serious process (aka getting a term sheet) with a VC, unless you see a major gap between what they offered and what you think you need. Most people tend to forget that this is a small world (and an even smaller industry) and if you try to "trick" someone, it might come back to hunt you in the future when you need another round of funding or even contacts.