Like Rick I have the BLE400 nRF51822 motherboard and its well made
As a side note, the actual nRF51 modules which are plugged into the motherboard are not actually made by Waveshare, they are made by www.hyyunjia.com
, specifically http://www.hyyunjia.com/product/html/?14.html
(Site is in Chinese)
Just by coincidence, I'm actually getting some other commercial boards developed by the same company "Shenzhen Hony Yi Jia Technology Co".