From my limited experience i would say it depends on the hardware and waht t they claim to offer you. The hardware I selected was recommned to me and confirmed on reading reviews.
There are 2 computers in my house. My computer is connected to a 54 Mbps router and the other computer is in another room using a wireless card.
I'm having some troubles with the other computer with the wireless card in it. After I installed the card, the connection speeds are always "Low" or "Very Low" It reaches connection speeds of 8Mbps to 36Mbps at the most. It never reaches 54Mbps. Also, the internet will just randomly stop working. When this happens, we have to reboot. But it happens often.
So my question is, how can I get the computer with the wireless card to get "Excellent" Or "Very Good" connection speeds at 54 and staying connected?
Both computers run Windows XP SP2, if you need any more specs let me know. Thanks for the help!