I just bought a Verizon MiFi on Thursday, and I have been using it all weekend. At home we have Verizon FIOS... so the MiFi is strictly for our very frequent traveling.
When we arrived at our beach condo on Friday evening, I plugged the MiFi into a wall socket and tested the range of the WiFi. I had assumed that this would be the achilles heal of the unit since the internal antenna is so small. Amazingly, I had full bars on the Airport icon no matter where I went in the 1400 sq ft condo. It easily penetrated several walls without any visible signal degradation.
For security, I did several things:
1) Changed the device password to a very strong PW
2) Set up WPA2 with a strong passcode
3) Enabled MAC address filtering... so that only our physical PCs could access the device... all others are rejected.
4) The only thing that I did not do was disable SSID broadcast... but I felt it was unnecessary after doing 1-3. I think I will try it out... to see if it is difficult to connect to an invisible network. (Has anyone ever tried this?).
There are essentially 3 ways to use the MiFi:
1) Tethered... which shuts off the WiFi and uses USB and and the VZmanager software. This method will show you your usage which is important if you have a monthly data cap.
2) WiFi using batteries: This gives about 4 hours of usage... and will be handy for a quick connection between flights at an airport as an example.
3) WiFi using a wall adapter. It comes with a wall charger with retractable prongs. This lets you use the WiFi without power concerns and also charges the battery.
If you want to check your usage without tethering... you must visit your account on the Verizon website. There is a hiccup for us Mac users. In order to establish your account, you must answer your passcode question. If you do not already have one (I don't because I use AT&T for my iPhone)... then they will send you a text message to your phone number. The problem is that this is not a phone per se... and the VZmanager for the Mac does not display text messages. However, the VZmanager for a PC does accept text messages. Our daughter is visiting tomorrow, so I asked her to bring out an old, unused PC laptop of mine... so that I can install the VZmanager... just to receive one text message and set up my account. This was pretty disappointing.
My wife and I have been using it all weekend with a MacBook Pro and a MacBook Air and it has been flawless. We felt the net slow down a bit during the busy evening hours... but then I tried the shared internet connection provided in our condo complex... and it was so overloaded that it was unusable. Hence... in our very limited experience, this is great. The MiFi will support up to 5 simultaneous users. So far we have only tried it with our two MacBooks... but I am sure that our daughter and another friend will want to try it tomorrow... so we will probably test it with 4 devices. I did not bother to include our iPhones in the MAC address filter... I really do not see the need in most cases... and I would rather use my free AT&T bandwidth rather than consume data off of the MiFi plan.
I am really miffed that they do not have an unlimited plan in our area. Does anyone know if this is universal across the USA, or if it varies by region? I will be on the east coast next week, and would gladly buy one there if I could get an unlimited data plan. The monthly charge is $60 for 5GB. After that, they charge $0.05/MB which is an exorbitant $50/GB. Be really careful monitoring your usage if you have a data cap. I suspect you would be quite upset if it cost you $250 to download a 5GB movie. I have set a strict policy that nobody streams any media when connected to the MiFi. Also... do NOT use it internationally unless you are very rich (if so, you are probably not reading this). I had an employee who believed he had an unlimited international data plan... and he came back from a trip to find a $4,000 cell phone bill which I had to pay. OUCH!!! I shut my aircards off if I am within 20 miles of the border of Canada or Mexico. I do not need any surprises.
One last thought. I called and requested that they shut off my MiFi if I hit a 5GB cap within a particular month. They said that they cannot support that request.
I hope this helps. I really am quite happy with the device. It is the size of a credit card, and about 1/4" thick. It is very convenient to have a personal hot spot whenever I want. For me it is worth the $60/month... but I am going into this with eyes wide open to monitor my monthly data usage.
/Jim