I'm 315 and have ridden something with similar power. I've also ridden a MUCH more powerfull direct drive (1500w) version of that bike. In the hills and accelerating from a stop I found the 750 watt completely gutless, and the much bigger one only slightly better. I'm amazed by the fact bikes like this are sold with direct drive hubs. If you look into the differences between a DIRECT DRIVE rear hub (like the Packa has) and GEAR DRIVEN rear hubs, I think you'll agree the direct drives here make no sense.
RAD has a very similar bike they sold for years with this same type drive (direct drive).
https://www.radpowerbikes.com/products/radwagon-electric-cargo-bike
I bring this up because recently, they completely updated the bike, to include eliminating the direct drive in favor of a gear driven system. This makes way more sense as they now have a motor that matches this bike's mission much more closely. A gear drive will have much sportier performance, much better get away from a stop, plenty of power to cross a busy road, good hill climbing, etc.
My point is, though it may sound like I'm trying to sell a RAD, that's not it at all. I have an issue with direct drive rear hubs due to their gutless performance levels. Especially when considering my (our) weight, I find the gear drives light years better. -Al