You need to get in touch with NowTV live chat with regards to the free Stick.
Use the green chat button on this link page below to reach them.
This is a customer forum, you are best to pop onto Live chat.
The topic of the "White Box" has been discussed to death on the fourm.
Make sure to click "Chat to an advisor"
Blue Box, you mean this one:
TBH Suffering, I tend to go for Roku streaming devices instead but there's no reason why this one shouldn't be a good buy, unless someone that owns this device says otherwise.
However, I think because they are quite rare nowadays the price for a new one has gone up astronomically, check out this Amazon URL: