Yes, I've heard of them. The brand is owned by a company called Dynacraft that sells primarily to discount stores and "wholesale" outlets.
They are NOT good bikes, in fact there was just a major recall due to frame failures. Many on this forum would call them "BSO", or "Bike Shaped Objects". Stay away from them.
We are in the business primarily of purchasing, refurbishing, and selling used bikes. There are a few brands of bikes that we will not purchase at any price- not even for $1- and they include almost every Dynacraft brand.