I think that the current reviews are unfair.
We have 5 of these on our network, they have been tested with 5 different routers (Three manufacuters - d-link, netgear, Draytek) and they work fine, signal strength is fine even at the other end of the house.
The only bad point is for people who are afraid to open up their computers as it requires a PCI slot on the motherboard. But even this is simple and you are showed how to do it in the instructions.
Probably the only D-link product that accually does what it's ment to do ;)
Overall a good Wireless PCI Card.
After some adds of the 108Mbps capabilities of the DWL-G650 and DWL-520 cards I decided to buy one. Unlucky me! I received the DWL-G650+ and DWL-520+. Apparently, these are the versions D-Link reserves for out-side the US. Trying to upgrade to 108Mbps as promised in the adds was unsuccessful. I didn't even find any info on the G650+ cards on the .COM website. Mails to D-Link remained unanswered. After some research in the newsgroups, I found out the following : The DWL-G650+ and DWL-520+ are using a different chipset than the G650 (the "+" is very important). You will not find this info on the D-Link website because the "+" has two major implications : 1:because the G650+ uses a cheaper chipset (Motorola) it has currently no 108Mbps support as its bigger brother does (G650, no "+"). 2:because of this chipset it has a very poor support on linux. So if one intends to use this card with linux - guess again and try some other card. When going to the European websites one finds more info on "+" and not the performant ones.
As a relative newcomer to wireless networks I decided to go for a Dlink Xtreme G+ solution following the claim of improved performance. I found the 2000AP+, the G650+ PCMCIA cards and the G520+ PCI cards a doddle to configure. After finding a channel that the G650+ cards operated stably I could not understand why the G520+ cards where unstable even though the laptop and the PC where side by side on the desk. Dlink technical support suggested forcing a drop in the tramsmission speed down to 36Mbps and although a ping test produced marginally better results the G520+ was worlds apart from the G650+. As the current driver is v.1.0 I am hoping an update will be along soon to resolve this problem!
The DWL-G520+ provides speeds of up to 54Mbps when TM used with other D-Link AirPlusXtremeG+ and other 802.11g products. This compares favorably with 802.11b adapters that offer 11Mbps speed, and with 802.11b+ adapters that give 22Mbps transmission. This enhanced speed and adoption of 2.4GHz frequency, now available for public use in most countries, plus the mobility and convenience inherent in a wireless LAN, make this card an ideal solution for bandwidth intensive WLAN applications.
Apart from the higher theoretical network data transfer speed of 54Mbps for 802.11g against the 11Mbps for 802.11b, the DWL-G520+ also delivers a much faster data transmission than other wireless LAN adapters. In a typical working environment with multiple users accessing the network at the same time, the DWL-G520+ operates at 8 times the speed of a normal 802.11b wireless LAN adapter, which is made possible by means of an embedded turbo engine on-board this card.
Like the 802.11b and 802.11b+ adapters, the DWL-G520+ uses a single 2.4GHz wireless frequency, eliminating the complexity of dual-band networking. 802.11g compatibility with existing wireless LAN standards means that you do not need to change your entire network to maintain connectivity. You may sacrifice some of 802.11g speed when you mix 802.11b and 802.11b+ with 802.11g devices, but you will not lose the ability to communicate.
By maintaining compatibility with your existing wireless network equipment, this adapter lets you upgrade to a higher speed at the pace you want. The DWL-G520+ and other 802.11g standard devices can be gradually added to your network, while the rest of your older network remains perfectly connected.
In addition to offering faster data transfer speeds, this card also provides the newest, strongest, most advanced security features available today. For home users that do not incorporate a radius server in their networks, security is provided in a convenient, automatic way (when used in conjunction with other 802.11g products). No longer will you have to frequently input a new WEP key to execute security operations. With the DWL-G520+, you will automatically receive a new key every time you connect, doing away with the inconvenience of manual WEP key input. The DWLG520+ provides a stronger network security with 64, 128 and 256-bit WEP data encryption.