The Costco Raleigh bike arrived yesterday; I built and test-rode it today after work. The unpack/build process was easy and took less than an hour.
Mine showed up in 95% condition. The packing job was great but the battery did break free from the mount during transit and was bouncing around inside the box. The case didn't crack, but a small plastic tab that is part of the mounting mechanism is broken off. This does not affect the electrical connection; I secured it with a velcro strap for a test ride.
The bicycle is of decent quality, about what you would expect from a $500 mountain bike. Bike store quality, not WalMart quality. In particular I was impressed that the wheels are perfectly straight right out of the box. The frame was well-wrapped in foam sheets and doesn't show any scratches or imperfections.
Riding impressions: The rear hub is geared and does whine noticeably but it is not really intrusive. The knobby tire noise is actually louder than the motor at street speeds. The index shifting is 9/10 right out of the box but could use a little tweaking. The SunTour drivetrain is impressive at this price level in that it is torque sensitive rather than cadence driven; the power has a very natural feel. The power cuts out at about 18.5 mph at medium boost; it might go higher in full boost but I didn't test that exhaustively. The Tektro hydraulic brakes are excellent with high quality levers. The Suntour suspension fork is not excellent; I would prefer a hard fork actually, but it's fine for the price.
@onlineaddy I measure 31 inches stand over at the midpoint of the sloped top tube. Honestly I was surprised by this number as the bike feels really small in an 'M' frame size. So small in fact that my 5'11" wife has declared it too small to ride comfortably and it will be going back to the warehouse. If there is anybody in Greater Boston that wants to come check it out and possibly take it off my hands I will hang onto it until the weekend.
Overall it would be hard to beat this bike at anything near $1500. My first ebike was a 2015 BBS02 conversion with a cadence sensor that cost double what I paid Costco and I much prefer the feel of this Raleigh. I would swap out the tires for non-knobbies but everything else I would keep the way it is. Great value.
I'd be happy to answer any further questions if I can.