Just bought this myself in the last few days when it was £38. Speed increased compared to my previous modem. Hot considering the price for a modem router at its class.
Quote directly from Amazon:
The Buffalo AirStation HighPower ADSL+ Modem Router uses the latest Wireless LAN technology to deliver high-speed Internet connections of up to 150Mbps, 3x faster than Wireless-G. The Modem Router incorporates a built-in 100Mbps 4-Port Router, a built-in ADSL Modem and is easy to set-up with the Buffalo AirStation One-Touch Secure System (AOSS). The ideal Modem Router for sharing your Internet connection between the family when viewing files, music or video and perfect to use when working from home. Simple push button set-up for a great combination of speed and security!