I would seriuosly disagree. I have both a maximum signal amplifer and Wilson Electronics and the Wilson Electronics is much better without a doubt.
I use this one
http://www.wilsonelectronics.com//ViewProduct.php?ID=127
What I do is lay my data card across the bottom of the cell phone holder and then clip my cell phone on above it (using the air card as support under it. There are 4 inward sliding clips to hold it in place so it works great, but it is especially good if you use bluetooth, which I do, so you don't have to take your phone in and out all the time.
One of my chase partners works for verizon. We both have the blackberry storm. I had mine in the cradle when we were chasing about a month ago and had full signal strenght. He was in the back seat and had no bars, so just to screw around I had him hand me the phone and as I got it within a few feet of my cradle his signal strenght jumped up to full. I can promise you it is an incredible piece of equipment. I wish like hell I had been using an amplifer before this year.
I will agree that Maximum Signal (it's a one man operation and I forget his name right now) did replace the first cyfre amp I got because it wasn't working, but the replacement one still doesn't compete with my wilson and the one I have from cyfre is direct connect so it's supposed to work better than wireless systems.
If somebody brings up that I'm sponsored by Wilson Electronics my answer to that is I wasn't sponsored by them until this whole issue came about. I was so pissed that I got talked into buying an inferior product on stormtrack (scroll back and you can read the thread) that I started talking with Wilson and now we are working together. My integrity is worth a lot more to me then free equipment and/or money so do whatever you want, but I am telling you that Wilson is hands down the better way to go. I would never work with or be sponsored by a company that didn't sell a quality product unless they were shelling out some serious cash lol and believe me that's not the case. I'm not even on a commisions deal.
If you do want a cyfre for an aircard pm me and I will sell you a brand new one. I only hooked it up one time. I still have the box and everything. It is a direct connect so you will get the strongest signal possible (they work slightly better than the wireless versions). I had this model from Maximum Signal
http://www.wilsonelectronics.com//ListProducts.php?Type=12 and when I had to have it replaced he sent me what he said was that version in a direct connect and it was actually more expensive. I didn't see it on his website and it's at home in my closet (at work now), but I'll knock off $100 and sell it to you. It is in it's original packing and literally brand new.
The Maximum Signal guy will back up his product in my experience, but he was pretty rude and abrasive at times. That doesn't matter much if you get your product so take it for what it's worth.
If you do want a Wilson pm me and I'll tell you the best place to go to get one. If you want the Cyfre from Maximum signal, like I said I'll sell you mine, so PM me on that too.