Quote from that site:
Speed (MPH) Up to 15- MPH Watts: 450- Battery24V
This MIGHT be half-way decent once you over-volt it to 36V, but I doubt you will be happy with it. It's running at 24V and whenever they say "up to 15MPH" especially on a cheaper kit, you will probably get closer to 10 MPH in real world use.
For another $100 including shipping, you could get a much nicer hub motor IMHO, and if you get a DD like the 9 x 7 in it's various forms, depending how fast you want to go, at 45V you can get 12 AH's of good quality LiPo for around $300, and then you have something that you will be much happier with.
Do you have the equipment to charge the LiPo already? If not, expect to spend at least another $200 on a good charger and power supply.
I like Amped Bikes, but that's just my preference, there are a ton more that sell the same basic kit around the same price (Ebikes.ca, E-Bike kit, etc.).
Nothing is perfect, and you might end up up-grading/changing connectors on any kit you get, but I'd go with something more proven. The Curry stuff is cheaper sure, but you do get what you pay for.