Siemens is a company with a great reputation for hi end equipment, but this phone system is a bad product. On the positive side, the features and functionality of the whole base station idea are fantastic. On the negative side: 2.4 GHz is notorious for microwave interference (I can attest to this), the range was no more than my old 900MHz, callers would daily complain of my voice "digitizing" or "strobing" to the point where I had to get on a hard line phone, the handset is too thin to attempt to cradle between your head and neck. Customer service is commendable, but I sent back every phone including the base set once and am still having problems. Don't buy this phone system.