Drano Max Gel Drain Clog Remover & Cleaner, Fast-Acting to Unclog Standing Water & Remove Hair, Grease & Food Blockages, Safe for all Pipes & Septic, Kitchen Sinks, Bathroom Showers, 80 Oz, 2 Pack

Customers find the drain opener effective and reliable, with one mentioning it saved them from calling a plumber. The product receives positive feedback for its quality, value for money, and ease of use, particularly for shower drains. While some customers report their drains flow like new after treatment, others experience slow drainage issues. The clog removal performance is mixed, with some customers reporting success while others say it didn't unclog their drains.