I have used weka in my course project in which I was assigned a dataset with 2 million tuples. I used weka for Data Cleaning, Data Selection, Data Transformation and Data Mining. I have strong understanding about this subject and would be the best fit for this job as I am not bidding on this project for money but for reputation.
P.S. I have done my b.tech. from NIT Calicut. I am mentioning this because at NIT course projects are taken very seriously so I had to spend some sleepless nights with this tool, which now gives me confidence to bid on this project.