Not enough data and is a big waste of… Not enough data and is a big waste of money for Keyword search. If you don't get a 1-week free trial just don't go for this company. Note: Maybe this applies to UK companies and they might have better data for US businesses.

The one free search result is wasted. The one free search result is wasted. Even if you key in the correct URL Spyfu messes it up somehow so that you don't get a result and have to pay. Grim strategic thinking!

Difficult overall We are most likely going to cancel. We don't like your website and the fact that every time we try and use it for one of your clients you know nothing about them even if they have been active for years in SEO and Adwords. Then I have to add in their keywords

Unreliable and never works properly Most of the time when you attempt to use the site its freezing, crashing, takes 10 mins to carry out a simple search, or just takes 10 mins and doesn't do anything. Terrible site that is rarely ever working properly. If you've got plenty of time to waste waiting for it to actually do something, this is for you. If you haven't got plenty of time to waste waiting for it to do something or of you don't like customer service that work 1 minute of a day, this is not for you.

Need a larger database of keywords When gathering and analyzing competitive keywords via tools such as Kombat, SpuFu is one of the best tools on the market. But my team has struggled getting baseline monthly search volume when trying to identify new keywords opportunities. We work in a niche sector so while this is not surprising, we found other tools that met these needs better.