KeywordSpy is appropriate for most Internet Market research companies. I would not suggest it for a corporate marketing department unless it's a company with a very larger budget. This is also not a tool for small freelancers even though there is a free option, to get the best benefit of KeywordSpy it's best to use most of its features and options and this can get pricey.
If you don't know the first thing about keyword research, learn about it, then make sure you use this tool. It's by far the simplest tool I use in my keyword research arsenal. That's not to say the others are difficult to use, this one's just the easiest. If you aren't focusing on your site's SEO, then I suppose SEO research and a keyword like this may not suit you, but I believe that every business that has a website should focus on SEO - so a tool like this is a good tool to have.
Most SEO and market research tools offer what KeywordSpy has but are not as detailed and in one place. Consequently, where you can do everything at KeywordSpy, with other tools you find you have to purchase multiple tools or subscriptions from different providers which also don't integrate with each other. KeywordSpy makes your research easier and more efficient.
