I visited the homepage of East-Tec. It says they are 16 years in the market. But i never heard of them. They got a positive review from Softpedia, a clean 5 stars. But that was on 15 December 2005. And their last review of this product was 2011. Dont know but my inner alarm ring.
Maybe I do them wrong. But i would chose Ccleaner over East-Tec Eraser, simply because Ccleaner is an established and trusted product.