Glad you like it! If you're a OneTab user I think you'll definitely enjoy using it. Like you said there are more features, but it's also much faster. If you have 1000 saved tabs, OneTab attempts to load all 1000 of them (and their favicons) every time you open your tab list.

Freezetab uses an infinite scrolling mechanism that loads your tabs as you scroll, so it's just as responsive when you have 1500 saved tabs as it is when you have 15 saved tabs.