As a prominent reviewer in the vaping community, I approach each product with a commitment to objectivity, drawing on extensive testing to provide balanced insights. The Hayati Pro Ultra 15000 in Blue Razz Cherry stands as a notable entry in the disposable vape segment, particularly for users seeking extended usage without the complexities of maintenance. This review evaluates the device across key dimensions, based on hands-on assessment over several weeks, encompassing approximately 5,000 puffs to gauge consistency. With its dual-tank design and high-capacity e-liquid reservoir, the Hayati Pro Ultra positions itself as a bridge between convenience and longevity in a market increasingly favoring sustainable yet user-friendly options. Product Positioning and Introduction The Hayati Pro Ultra 15000 is marketed as a premium disposable vape tailored for moderate to heavy users who prioritize flavor retention and device endurance over frequent replacements. Launched as part of Hayati's evolution from earlier models like the Pro Max series, it targets vapers transitioning from traditional smoking or those dissatisfied with shorter-lived disposables. At its core, this device promises up to 15,000 puffs, powered by a dual 12ml e-liquid system—effectively 24ml total capacity—infused with 2% nicotine salts for a smooth throat hit. The Blue Razz Cherry variant, a fusion of tart blue raspberry and sweet cherry notes, exemplifies Hayati's focus on bold, fruit-forward profiles that appeal to fruit enthusiasts. In the broader vaping landscape, the Hayati Pro Ultra differentiates itself through innovative features like a switchable mouthpiece for tank alternation and an integrated display screen, which are uncommon in disposables. Priced competitively in the mid-range segment (typically…