I am a first time Vitamix user, I got the A2500....Love it! I have waiting for year to purchase 
 as I had invested in another brand right before learning about Vitamix and so waited before moving to Vitamix....I am not disappointed in the product, my smoothies are finally very very smooth. 

In my heart this should be a 5 start, except for this challenge.

My early takeaway from is specifically relates to the cup and blade, it is ridiculously difficult to tighten the blade onto the single use cup. My hands are smaller and so I spend more time literally fighting to tighten to close and then fight to take the blade off. I have to slightly tilt the cups to get an angle for put some real elbow grease in... :-)

Could you consider for later design a type of handle to help out, or maybe if the cups we not so smooth it would help out as well...  Thanks.