The customer service for Evnroll is very disappointing! I purchased an ER6 from their website after reading a number of favorable reviews. Their website provided no choices as to weight, grip type, etc., only for length. When I received the putter is was too heavy at 385 grams. After multiple attempts to contact them I finally heard back that they have different weights for the putter head. I requested a 355 gram weight. Multiple attempts later I finally was told that they mailed me a new weight for the putter. Ten days later and no weight. I am returning the putter back to the company. It's too bad that a company with apparently superior technology cannot execute on basic customer service. Perhaps Guerin Rife should sell the technology to a company that can execute on it properly.