LTP - one of the oldest running Keyword Research tools with massive experience and success on the market. This is a no-brainer purchase.

I just ran quick sample research, and I can already pick some golden nuggets that will result in traffic and money. Things I missed or weren't obvious on the mainstream tools like Ahrefs or KWFinder we also use (and pay a lot for!).

Excellent user interface and clean, easy-to-read keyword lists cannot be underestimated. Since we use our... "visual calculus" to make the final decision on which keyword we choose to work on, I would argue that the "cleanness" of the UI (keywords lists) plays an essential role in identifying your money keywords. For Keyword Research specifically, there is no doubt that LTP has the best user interface on the market.

The expected Appsumo launch rush for such an amazing deal will certainly affect customer service, performance, and some tool features. Nevertheless, I wouldn't miss it if I were you, since I'm sure these issues will be resolved soon.