Most people have not heard of Nashville tuning, where lower strings are raised an octave, giving a very chimey sound. This is used a lot as a contrasting second guitar to bring an extra dimension into an arrangement. These strings work as well as you would hope in duplicating this effect, but there is a catch:
The lower strings are very small compared to the typical grooves cut into your guitar's nut, so you may find it necessary to make temporary fix by sticking something under the string in the slot to stop it being too low and buzzing, or if you plan to keep the guitar in this tuning, by getting a new nut cut