As the other Cmdrs said above, it works just fine for trading: They will hold long enough for you to escape if you are interdicted, and are also enough to deal with bumps/landing mishaps.
However, don't go looking for fights with them, they will melt pretty fast and repairing hull damage in that ship is... Painful.
However, don't go looking for fights with them, they will melt pretty fast and repairing hull damage in that ship is... Painful.