I've had several Panasonic DECT phones and they're excellent. Except for one major flaw -- which may or may not be a deal breaker for you -- it has pretty much every feature you'll need (SEE UPDATE). Here are some thoughts:
1) Sound quality is excellent. I've never experienced any dropped calls or interference, despite being surrounded by lots of electronic equipment and other cordless phones. Such is life in a New York City apartment. Range is good. I live on the 4th floor but am able to take a handset on the sidewalk and make calls. The base is deep inside my apartment, far from the window. That's pretty amazing given all the metal and concrete in NYC buildings.
2) The taking Caller ID it's very good. The speech is loud and clear, and is activated on each handset. It reads most English words very well. Spanish and Chinese names are not as successful. Regardless, it was the main reason we bought a Panasonic and we love it. It's great to not have to remember numbers or to run to a display.
3) The block caller list it's also a godsend. You can program in 30 numbers that will always get a busy signal when they call. Your phone will ring once letting you know someone tried to call. you can then look at the Caller ID and decide whether to pick up or let the Caller hear a busy signal. Some people don't like the fact that it rings you at all. Unidens, for example, don't ring you if the number is on their Block list. While it's nice not to be bothered, you run the risk of not knowing that a Blocked caller tried to call unless you check your caller ID. I personally don't mind the single ring.
4) I also love the fact that you can give callers their own ringtones. My immediate family members, for example, get Beethoven.
5) I like the fact that the directory is shared. That means that a number entered into one handset is automatically accessible by all handsets. With some phones, you need to manually flag the numbers that are globally accessible. That's actually a good thing if individual family members want to keep some numbers private but I found it inconvenient.
There is a negative however. Since the phonebook is stored in the main base unit and not in the handset, that means you have no access to it if there is power outage. For example, when NYC had its big blackout, I was unable to access the numbers to call on my cellphone.
6) It has an excellent alarm clock function. It's very loud and can be programmed to repeat. Although you only have one alarm (per handset), the alarm has a date. That means you can program in an alarm years in advance!
7) The white backlit LCD is great and very legible. much better contrast than the Orange/Amber of most displays.
8) Uses ordinary NiMH AAA batteries instead of proprietary battery packs. That means you can easily replace them when they no longer hold a charge. Much cheaper too.
Unfortunately, it also uses a VERY dumb time-based charger. Instead of intelligently measuring when the batteries are actually charged, it seems to base this on how much time the handset is in the charger. For example, whenever you put new batteries in, the display tells you to charge it four 7 hours. The problem is that you can fully charge the batteries, take them out and then put them again, and the stupid display will still say that they need to be charged 7 hours!
[LOOKS LIKE THE BELOW HAS BEEN FIXED. PLEASE IGNORE THE FOLLOWING PARAGRAPHS. READ THE POST AFTER THIS ONE FOR MORE INFO]
HERE IS THE POSSIBLE DEAL BREAKER
For some stupid reason, you can NOT screen calls on the handset!!! We've had many cordless answering machine phones and Panasonics are the only ones that can't screen calls on the handsets. That means you wouldn't know know what the message is unless you're sitting by the base, where the speaker is. You'll have to guess whether to pick up the call based on the Caller ID alone, and listen to the message after the Caller hands up. With my Uniden, I merely had to press a button on the handset to screen the call. This can be a problem if you have a large house or yard. It was almost a deal breaker for us since we have two large apartments in the same building, sharing the same cordless phones. That means we can't screen calls most of the time since we're usually not near the base, even when we're in that apartment.