Its a very good possibility I may get a second set up such as this to place on my other phone.  Have good luck so far with just a blacklist, but I foresee adding since sometimes the other phone rings first.

Your not the only person who has spoken highly of the sentry. :)

Unfortunately, frequently changing fake caller IDs to get around blacklist call-blockers is becoming standard practice by telemarketers, so over time they will keep bothering you again and again and again.  Also, you still get bothered at least once before adding them to the blacklist.  The Sentry 2 solved that problem for me...

More than four months have passed since I bought mine and I haven't been bothered, even one time, by any unwanted scum caller.

Wayne, this sounds like a very good product.  I just watched a youtube video on the product, and it says it has 50 slots for rejected calls.  This would fill up in six months or less around here, 10 years on the DNC notwithstanding.

I got a Panasonic phone set from Costco a couple of years ago that seems limitless.  I don't know how many block slots it has, but the phone book keeps telling me when I add a new contact that I have something 2688 contact slots remaining.  Fingers crossed that there are as many blocking options, so I don't need phones all over the place to accommodate blocks.  The phone rings once,  so I just don't run for the phone until the 2nd ring.

I just got a call from the 253-257-5233 on my unlisted cell phone, to which my friends don't even have the number, since it is used for Outgoing calls.

The Sentry will block over 1000 numbers,my fios landline only blocks 10 numbers.

I'm not sure what you were watching on YouTube (maybe the previous version Sentry?), but the Sentry 2 can store up to 1200 blacklist or whitelist numbers, not just 50.  Even if you choose not to add an unwanted caller to the blacklist, you won't get bothered because the telemarketers don't bother to listen to the whole Sentry warning message and then enter 0 to be added to the whitelist.

I've had mine for about 4 months now and have NEVER been bothered, not even one time, by any scum telemarketer!  Yes, it is a wonderful device in my opinion!