I can only recommend this product - despite the start already adequately described here (configuration) problems. Also "laymen" I recommend the product - solely on the basis of the good results that can be achieved (for configuration one can also consult someone who knows a little better).
Additional reviews can be found in addition to the product at this link: Linksys WRE54G-EU Wireless Range Expander (Supports 64/128-bit WEP encryption in 802.11b / 802.11g wireless LANs)
- This is the same device with a different model number basically. The many reviews are also very helpful to overcome the configuration problem.