This is a very well made product that does exactly what it claims to do. Used with an iPad or iPhone and appropriate apps you can record relatively easily at surprisingly high quality levels. You can also input to other apps like oscilloscopes etc.
It is solid and quite heavy and this is one of its problems. The strain put on the connector is substantial. With the best will in the world it is impossible to guarantee that you will not pull on any of the leads going in or out of the unit. The inevitable result will be a damaged input socket on your iPad or iPhone, this will be expensive to repair!
I use mine with an iPad and my solution was to make a board to hold the iPad and the GuitarJack with an edge piece around both to keep them located and some clips over the edge to hold them in place. A stand at the back holds the whole assembly at an angle for easier viewing.
This works well and if the 1/4in jack gets a tug then the whole lot moves and the strain is taken by the mount not the connector.
Would I recommend this to a friend? Yes, I already have.