Is this DIY kit too cheap?

Hey guys,
relatively new to diy electric longboard.. I found this kit:

http://www.aliexpress.com/item/Electric-Skateboard-Conversion-Kit-E-board-Motor-Power-System-Electric-Skate-Drive-Frame-System-E-scooter/32378262442.html?spm=2114.10010108.100010.4.lPHWkV

Seems really cheap compared to others Iv seen, is it good?

thanks

I looks like there's price competition from others linked on that page, so maybe not so unusually cheap. I can't read the spanish but I'll mention I don't see a controller in the pictures.

its in english?
the 2 motors:
1800W Brushless Motor
Model: N5065
Voltage: 18~25.2V
Power: 1800W
RPM: 270KV ( RPM / V )
Max current: 40A

Do you think they will be good, like if I did a set up of those 2 motors and:
Lipo Battery - 4 x Turnigy 5000mAh 3S 20C Lipo Pack
ESC - 2 x FVT-120A

what sort of speed and distance do you think i could get?

I've seen this but on an chiense website called taobao which is an alibaba subsidiary, ever heard of benchwheel
That set comes from their dual motor long board

http://m.intl.taobao.com/detail/detail.html?spm=0.0.0.0&id=45114305342

Thats £130. Really cheap and delivery is £35.

I'm not sure if they are good

http://m.aliexpress.com/item-desc/32545620238.html

English? I'm not even getting SPANGLISH!

Informação do motor:

Modelo: N5065
Tensão: 18 ~ 25,2 V
Potência: 1800 W
Rpm: 270KV (rpm/v)
Max atual: 40A

Click to expand...

Keep in mind that's EACH motor. Do you really need 3,600w? You'll need two controllers. I'm saying they're probably not included because they're not pictured. Note the others that show the controller. ($213 shipped ain't bad for that 1,500w brushless with a controller, I might add.)

So you're talking 22.2v at 10ah. Theoretically you'd start saying 40ah per motor per hour, but you won't make it. 10/80 would be 7.5 minutes in that purely mathematical world. You're not running it nonstop 7.5 minutes anyway, so this only discourages you from thinking of long range. YOu just need to find out if anyone is running such motor power with the same battery.

Hey add a dual SimonK ESC to this kit, couple batteries and you have a ultra affordable build! That's actually a very good alternative they have brought.

Plus if you can access a 3d printer or a CNC machine, repairs will be easy too.