Liv is one of my favorite LELO vibes. It's definitely not as strong as the Ina or Mona but I do find it to be as strong as the Alia.
It's a nice shape for shallow thrusting, works well as a clit vibe and lasts forever and a day on a charge.
It's great for those who like a moderate to slim sized vibrator and don't need Hitachi-like strength.
Hope that helps!