Keyword Search Tool

Hello friends,
Yesterday I had a discussion with one of my SEO friend about the SEO tools. I told him that I check the keyword position manually and he told that he is using the tool seoserp[dot]com. And according to him it gives the relevant result. So Even I thought of checking that tool but found that all the results were different from the manual search result and I found the one of my keyword which was on the position 5th while that tool shows its position 12 in Google.
Please share your thoughts on this tool if anyone is using it or know about it..

Thanks

I always use Google Keyword Tool External too. and some other tools to get my final keywords.

I search my key words manually and some times i use the rank tracker to search my key words in the Google, Yahoo and in The bing..

Well in this case if you have enough time then try to manual, it will help you in where your competitor keywords work and where yours.