The kit has a cheap basic controller without the option for pas Dav, also there not being a led or lcd you will have no access to any assist levels.
It will be pointless to pay for that kit then to spend another £60 - £90 on another controller and lcd.
Also the DD kits are heavy at about 5.5 -6kg for the hub alone, efficiency isn't good unless you are riding at higher speed all the time. It depends really on the use you want out of it.
It's a cheap no thrills basic bike kit, often buyers think it good because it cheap but then are disappointed that it doesn't quite meet up to their expectations.