Summary: Ok. I bought the WAP54a & a single WPC54a card. I am not kidding when I tell you that this is an orphaned product. The drivers are so buggy that they can hang any machine. I think that most of the problems are related to the physical manufacturing of the WPC54a card itself as I can get a good connection if I physically pull the protruding portion of the card upwards. Other than that, the connection fails miserably. -hrm? Regardless...
Summary: I asked my wife to get me this and the dual-band WAP from Linksys for Christmas. Normally I do my homework and research something before I buy it, in this case I didn't and I got burned. I am seeing a lot of the same problems that have been reported here. I have a Toshiba Satellite running XP. I got the system lockups as well. Updating the driver from the Linksys website (actually a clean install after doing a complete hard restore on the laptop!
Summary: The card installed properly with the shipped drivers on a Win98SE machine, but file transfers stopped every 6-8 seconds for 1 to 2 seconds. Just enough to sometimes disconnect the remote machine. New drivers on Linksys Web page (1.04.00.39) fixed the problem, but disabled Turbo Mode. A call to Linksys confirmed that Turbo Mode has been disabled in the Drivers (at least for Win98SE). A few days later the card began to fail when hot.
Summary: I have to agree with another reviewer; the card seems like a great deal, but it just doesn't work. After several e-mails back and forth with their "technical support" department, they stopped responding. The basic problem is after running for a while, the card will lock the computer forcing you to remove the card to restore the computer. Purchased a DLink DWL-A650 as a replacement and have not had a problem. Linksys will not take the card back for repair or exchange.
Summary: I am extremely happy with this product and its corresponding WAP54A wireless access point. I would steer clear of the dual-band as I have heard and seen nothing but bad news on that product. I have the WPC54A card for multiple laptops at home, one running Windows ME, one running Windows 98SE, and one running Windows 2000.
Summary: I've had pretty good luck with other Linksys products in the past, but this thing will drive you insane. I am using a Dell Inspiron 8200 with XP Home Edition and the new Linksys dual band AP. One day it works, the next day it won't...literally. Lots of bluescreens and hangups. Sometimes XP doesn't even see the hardware in Device Manager?!?
Summary: Unit runs hot, and doe not work under Win2k. Unit hangs within 1-15 minutes. Pulling card out of slot resolves the issue, reinserting resets cards, but hangs again within 1-15 minutes. Tech support (in Philippines) cannot help. Issue under review by Linksys. Update: Linksys would not fix. Warranttee not worth the paper it's printed on. The unit is in the garbage, as my new laptop has built is WiFi THAT WORKS!!
Summary: I bought this WPC54A adapter for use with my Linksys WRT51AB access point under Windows XP but was completely unable to get it to work. It always locked up my Gateway Solo 9550 laptop within 10 seconds of plugging it in. I tried the later drivers as per tech support and after that my laptop froze immediately every time upon inserting the card. Tech support suggests that this may be an IRQ conflict, but there is no way to change the IRQ.
Summary: I purchased two of Linksys' 802.11a PC Cards, due to pleasant experiences with Linksys products in the past. However, this product caused two laptops (Dell Latitude C840, Toshiba Portege 3480) to hang. The laptops were both running Windows XP. I contacted Linksys' technical support, who stated that the problem was due to IRQ conflicts, and that I would have to contact the laptop manufacturer technical support to reassign the IRQs; however, Dell's technical support...
Summary: I am quite disappointed with this product. First of all, did anyone mention that "Turbo Mode" doesn't work if you are running Windows XP? The only place where I see this mentioned is in the Troubleshooting section of the Installation Guide. Second, 152-bit WEP encryption is not available. The highest value available from the drop-down is 128 bit. Both of these problems are present even after I updated to the latest driver. To me, this is false advertising.