Extreme Outdoor Sports is praised by customers for its knowledgeable and friendly staff, quick delivery, and excellent customer service. Many express gratitude for the assistance received during their first gun purchase and appreciate the helpful tips and advice given. Some customers have had issues with delayed deliveries or incorrect stock information, leading to frustration and disappointment. The website is mentioned to be distracting with frequent pop-ups. Overall, customers rate the product quality highly and recommend the store for its wide range of offerings.