The biggest indicator missing is value. Like, 5 stars for a 30 dollar vacuum pump... if it works a few times I would give it five stars. For a 300 dollar one. I

The biggest indicator missing is value. Like, 5 stars for a 30 dollar vacuum pump... if it works a few times I would give it five stars. For a 300 dollar one. It better pull the needed mmhg perfectly and work for years. There's a use case for both