It is convenient by the weight but be stalling one end on a chair or sofa to be able to unfold because the legs do not lock !!! The coating is somewhat fragile and easily scratched with nails. The tips of legs begin to fall and plastic pieces have started to break. The head holder no longer holds tight, I had to add platiques washers into the clamping system !!! ... I'm served me 10ène times only ...!
