The BenQ-Siemens SL91 is a slider-style mobile phone released in the mid-2000s. Below are its key specifications and a summary of customer reviews:

Specifications:

• Design: Slider form factor with a metallic finish.
• Display: 2.0-inch TFT screen with 240 x 320 pixels resolution.
• Camera: 2-megapixel rear camera with autofocus and LED flash.
• Multimedia: MP3/AAC player, video playback, and FM radio.
• Connectivity: Bluetooth, USB, GPRS/EDGE (no 3G).
• Memory: 22MB internal storage, expandable via microSD (up to 1GB).
• Battery: 820 mAh Li-Ion (up to 300h standby, 5h talk time).
• Other Features: Speakerphone, Java support, email client.

Summary of Customer Reviews:

• Positives:

  • Sleek, premium design with a solid build.
  • Good camera quality for its time, especially with autofocus and flash.
  • Decent audio output for music playback.
  • Smooth slider mechanism.

• Negatives:

  • Limited internal storage without expansion.
  • Battery life was average, requiring frequent charging.
  • No 3G support, limiting internet speeds.
  • Some users reported sluggish menu navigation.

Overall, the SL91 was seen as a stylish mid-range phone with solid multimedia features but had some performance and connectivity limitations.