I've had my
weBoost Drive 4G-X OTR for a year and three months and have had it all over the country, from the coast of Maine to the Mexican border.
If I have any service at all, it will typically double or triple it. Even when I don't think I have any service (I dont know what percentage it takes to show a single bar), it seems to help the phone cycle through and find a bar, then more.
One thing I have noticed with it, repeatedly, is that the 12v plug end could use some improvement. It sometimes will appear to be plugged in and on (red light on) but it is not all the way on, as in light is on but no power is going to the box (no green light). A touch and a fiddle makes it work; the red light actually gets brighter and the green light on the box lights up. Had that happen in two different 12v outlets, and may try a new dedicated outlet of a different type.
It is fairly directional inside and usually needs the body of the vehicle between the outside antenna and the smaller inside sending unit. I have my antenna up on the back of my van and the inside antenna tucked into the headliner between the front seats. If I have the rear doors closed it usually works better than if open. Their literature, or replies to others, suggest if there is not enough vehicle body between the two, it creates a feedback loop of sorts.
I attached my antenna to a larger, very rugged, magnetic mount meant for CB antennas.
I know guys with fiberglass or aluminum surfaces who have attached a plate so a mag base would work for their various antenna needs.
Overall, it's been WELL worth the pesos spent. It's allowed me to be more in touch than previously. As someone who travels solo almost exclusively, that's important to me.