I usually check America's Test Kitchen for equipment reviews. Problem is, they change their top picks before an appliance wears out (blender, food processor). I've seen many people make dough in a food processor. I belong to ATK's websites, so I have access to everything on their sites. ATK is showing Breville's BBL620 as their top rated mid-priced blender.
As for ratings, I probably wouldn't buy anything less than 4 stars. Sometimes people have a bad experience with a product that may just have been a defective product. I bought the largest Breville countertop Smartoven, over 12 functions, cooks with convection. Someone panned it in a review but mine has been humming away for over a year with me using almost everyday, sometimes several times a day. I'm cooking for 2, so it's so much better than heating up my huge Jenn-Air oven.
Everyone I know who has an Instant Pot loves them. BB&B is now carrying them so you can use your 20% off coupon. I've not heard of anyone having to replace one.