Rating: 
Summary: almost eliminates telemarketers
Review: I've had it one month and have only gotten two manually dialed calls, and no messages left. I use to get at least three messages and five calls every evening, and more on Saturday morning . I had to turn my ringer off because they always woke me up.I'm not here until late evening , so I think I get removed from the list of most of the calls I would have gotten without even noticing the the call . I've only had about six calls in the month that hung up after the three beeps.
Rating: 
Summary: Works as advertised
Review: I've had this product for about a month and a half. Before I installed the device I was getting between 35% to 40% telemarketing calls (out of all calls to my home). These were mostly the "Out of Area" calls. After checking my Caller ID log today I see that the number of telemarketing calls is now only about 15% of my total calls. The nice part is that I don't have to deal with some moronic telemarketer-- the call is just zapped, which to me is more desirable than having to talk to these cretins.
Rating:
Summary: HONESTLY.....IT WORKS!
Review: I'VE OWNED THIS DEVICE FOR MONTHS. IT INSTALLED IN 2 MINUTES AND HAS ELIMINATED ALL COMPUTER-DRIVEN TELEMARKETING CALLS. IT EMITS A BRIEF TONE WHEN YOU RECEIVE A CALL "TRICKING" THE COMPUTER INTO THINKING YOUR NUMBER IS NO LONGER ACTIVE. OVER TIME YOU ARE ELIMINATED FROM MORE LISTS. YOU WILL LOVE THE SILENCE!
Rating:
Summary: Its value depends upon how much you dislike telemarketers
Review: If you're fed up with half-wits pestering you at home in the evening, this device is a godsend. I had been receiving an average of three calls each evening, which I tried to deal with by turning down the answering machine. But I still heard the 'beep' each time a call was received. Worse yet, some of the callers felt the need to leave a message. The TeleZapper cuts off these calls before they even get to your answering machine, or to you. There are competing products that cost less, but this one is the most effective that I've found.
Rating:
Summary: Gee, It Actually Works!
Review: Installed it three weeks ago and not one call since from telemarketing. Now if I could just get it to block out wrong numbers from drunk dialers in the morning I would have my phone problems handled!
Rating: 
Summary: The TeleZapper Works
Review: It works! I haven't spoken to a telemarketer since I started using it (3 months). It's small and easy to install. The only drawback is everytime I pick up the phone to answer or make a call, I hear the "disconnected" tone (kind of annoying). Also, I still get alot of telemarketing calls, but when I pick up to answer I zap them! I gave one to my Grandmother for her birthday and she's happy w/ her's too. So we'll continue to zap telemarketers!!
Rating:
Summary: Works for me...
Review: It's a lot quieter around hear since the telezapper. Well worth the cost of the product.
Rating: 
Summary: Don't waste your money
Review: It's not worthy to spend money on the device which is not upgradeable, and it turns out you keep wasting money buying next new device, I have one TeleZapper didn't work well after a while, now TZ900 then wnat's next ! Not for long you will enforce to buy TZ1000, TZ1100, it will never end !
Rating:
Summary: Worked to get rid of the most annoying of the calls
Review: Like other reviewers said, it doesn't get rid of the direct dialed calls (like the regional poll'ters) but it seems to have caught the most annoying of the telemarketers that were leaving obnoxious messages on my phone machine almost daily. This works really well if you pre-screen your calls with a home answering machine. Or if you are not home and the machine fills up with recorded messages from telemarketers. It's not so great if you have to have all three beeps as they are more obnoxious than the single tone. Or if you use a phone company answering machine (totally useless then) I'm glad I've got it though.
Rating: 
Summary: Zapper Mania
Review: Makes a disturbing beeping noise for all callers including those you want to ring through. Not sure it stops telemarketers since many still get through. Claims (after the sale) to only stop electronically dialed telemarketers. A toss up.
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