BD torque converter in a 518

[Free89W350]

I was wondering if anybody was running one and if so how is it working for you. I am getting ready to buy on and I have talked with both BD and Georend and they have both been very helpful and honest but the BD came in about $100 cheaper. I know the BD is approx 400 rpm less then factory and the Georend is 500 rpm. I just need some experianced input before I make the jump.

Thanks Ryan