I've not had any experience with this kit, but if you have a steel front fork and a water bottle fitting, this front drive kit seems easy to install. I would add a hose clamp under the battery to bolster it. The elctronics is in the battery cradle, so that's one less thing to do,
https://dillengerelectricbikes.com/e...dillenger.html
I've had some experience with this kit, but it's more DIY. You have to buy a battery. Then you have to think a bit and install the electronics.
https://www.amazon.com/EBIKELING-Waterproof-Electric-Bicycle-Conversion/dp/B07MG7XK45/ref=sr_1_9?keywords=ebikeling&qid=1559325768&s=gateway&sr=8-9
This was my first ebike conversion in 2015, and I wanted to show you what I mean about the electronics/wiring being a pain in the neck. EVeryone figures it out eventually. I got mine squared away. That is one nice thing about the kit you mentioned, and the Dillinger kit has less of it.
So I had $500 into my ebike back in 2015. 500W motor. 36V battery. WIll run 20 mph, but not for long unless you do some pedaling. At 13 mph, I've done the metric century (62 miles) on one charge on a nice summer day. I would get half of that if it's chilly though. For me, the kit has been reliable, and it is an ebikeling kit.
Now I think I have a nice bike with a kit, because I started with a decent bike (in my opinion anyway) but heck these days the same seller will send me a complete ebike for $899, $399 more than what the first kit cost.
https://www.ebay.com/itm/ebikeling-3...ry!60565!US!-1
Do some reading. Ask around. You can buy am inexpensive ebike, or if handy build a even less expensive one, but the make-buy decision gets tougher. And I have not talked abut the $170 big 1000/1500 watt motor kits which will go close to 30 mph if you have a big enough battery. Those you cannot buy easily as a complete ebike, probably because they're not too legal.