. In general, the vacuum cleaner works well, but it consists of many plastic parts that are put together in such a way that it is difficult to remove them without breaking something. An example is this switch. It is made entirely of plastic and can be hit if the user drops the pen or drops it on the ground. Such impacts can easily damage or break the transmitter's release button, which would be less common if the part were metal. At almost $9 for a small piece of plastic, I can't imagine it would cost much more if it was aluminum or stamped metal.