AppSumo, an Austin, Texas-based platform, is an online marketplace specifically designed for entrepreneurs, offering a vast range of digital tools and software at often unbeatable prices. AppSumo prides itself on providing lifelong software deals, eBooks, courses, and various other resources aimed to help startups, businesses, and freelancers. In essence, it is a platform that offers lifetime software deals at a cost-effective price.

1. Interface and Ease of Use: The website offers an intuitive, user-friendly interface with a clear listing of available business tools and deals. Each product comes with an extensive description, features, user reviews, and FAQs that simplify the decision-making process and navigation through the site is seamless without any technical glitches.
2. Range of Software and Tools: AppSumo offers a vast selection from marketing, productivity, security, design, administration tools, and more, catering to virtually all business needs. Each product or service is often bundled with a wide range of added features which makes them valuable for small and medium enterprises.
3. Prices and Deals: The pricing model of AppSumo is its major selling point. The platform routinely provides lifetime deals at prices normally associated with monthly or annual subscriptions. For businesses on a tight budget, these deals can offer massive savings.
4. Customer Support: AppSumo offers commendable customer service. Their team is responsive, friendly, and often provides complete refunds if a product does not live up to its hype or if a user is not satisfied with the purchase, emphasizing their focus on customer satisfaction.
5. Credibility and Trust : AppSumo only offers products from established and trusted companies. They have strict criteria for the products they list, and this commitment to quality ensures that users can rely on the products and services they purchase.
6. Product Testing and Reviews: Before listing, often each software has been thoroughly tested by the AppSumo team. Products usually come with a host of user reviews, providing real-life experiences and insights, aiding in making an informed purchase decision.

In conclusion, AppSumo is an invaluable resource for entrepreneurs, freelancers, and businesses of all scales. Their well-curated selection, focus on deals, and commendable customer service set them apart. However, as with all purchases, one must evaluate whether the offered software meets the individual and specific needs of the business before making a purchase.