What I like and appreciate a lot about Keyword Scout is its speed scraping keywords. It scrapes and presents keywords at a fraction of the time it take Micro Niche Finder. Its proxy scraper is quite nifty and usually gets me a couple of good proxies to use. But Keyword Scout works quite efficiently and fast without them -- if you're not one of those pedal-to-the-metal type keyword scraper.
Keyword Scout is powerful, but easy to use -- it easily makes you forget the pain you suffered from Market Samurai. I also like the design of the software and how all the component are practically and logically laid out, and ready for you to select how you want it to work. I also like how it throws in several "Aha!" keywords at you that will open up a whole new niche ideas for you to go after. And if you just want article ideas for your niche, then Keyword scout will surely be your writing muse.
Keyword scout packs a lot of keyword searching muscle, and its drill-down functions are always there to go the extra mile for you. It can scrape the keywords you're after, but after it delivers the keywords, it offers you the detail tools that will help you mine niche gold. Since I got Keyword Scout, I've been using Micro Niche Finder less, and Keyword Scout more. It's fast and responsive, and delivers the research I need quickly and on demand. It also has several separate apps, namely Google keyword suggester, LSI keyword research, and SEO competition analyzer. Oh, did I forget to mention it also scrapes product keywords from Amazon?
This is a must-have tool for IM success!