I bought a 6KG IFB Senator DX and used it for 1 month now and I have to say that I am satisfied with the product.
Initially was sacred to buy IFB because of these reviews, even though my parents are using this branded washing machine from the last 6 years without any issue.
This is an excellent machine. A bit expensive but well worth the price.
During high spin of 1100 rpm, it is expected to be noisy. However called up the customer service to check. Service guy turned up in 2 days after the call and he verified and it was normal.
Keeping that apart, this is worth a buy.