That bluemonkey BEC may be plug n pray but for that much money Id much rather have the Castle 10A. Then again I have crimpers and pins to make the splitters and connectors one needs to hook it up too. I have an extra pair of crimpers you can have cheap Hulkmaxx if you're interested. If your...
On kits with only 2 servos and only running at 6V I just use cheap hobbywing brand BECs. On something with more current draw or Wanting to run something other than 5 or 6V I use Castles 10A BECs. I really like how you can program them using a Castle Link for any voltage between 4.8V and 9V...