Purchased the small frame Surface Shred for my 13 year old son in December. We were disappointed that we didn't get the larger battery because of supply chain issues, but this is the best overall Ebike mountain bike on the market hands down. Why? Many reasons but overall it's quality.
The support from Surface has been phenomenal and the fact you can buy direct or through a dealer is an excellent support model.
Secondly, the bike is very well configured from the Bafang motor to the quality brakes, the light, to the frame and tires. I would recommend ordering one w/ the tail light setup, a rack, fenders and the 6way adjustable neck. If you are purchasing the large size, or want a lot more range, get the larger battery as well. Together you have a great trail/street bike.
For a rear drive the bike pulls really well uphill. I was surprised because I have a 1000W mid drive and after riding both i find the 500W strong. Let's just say my kid keeps up with me easily and the adult version is the same. The bike is also fast and brakes are excellent. No scraping brakes sounding like the pads need to be replaced. Also handling? This bike has a great balance when riding it. It's the perfect balance between not too big and not too small, not too light, not too heavy.
It is clear Surface thought all this through in the design. I wished they had added an onboard alarm - but most Ebike companies don't do that. I highly recommend this bike and moreso Surface as a business.