Summary: The phone's are use daily for our office. You can't use the speaker phone do to bad static and people complain not hearing you when you are on speaker. You can't put a multiple people on hold at the same time. I don't care for this phone and will not recommend it to anyone.
Summary: Ordered 4 phones and had to replace one for very poor speaker phone quality. Occasionally, the sound will deteriorate, even when not on speaker feature, for a bit and then resumes. The weakest part of this phone is speaker feature.
Summary: Bought 2 ks-ts4200b 4 line phones in Nov 2010. Speaker went bad in Feb 2011. Panasonic returned a "refurbished" phone in which the speaker also became defective June 2011. Panasonic returned another "refurbished phone". The speaker on that phone died in August 2011. Returned that phone after waiting six weeks for a return label. Panasonic responded with a bill for $85.00 if I wanted the phone fixed!!
Pros: Most functions work ok
Cons: Bad speaker phone, Not Durable, Poor service, Poor Sound Quality