Works great for the price!
Your review: We have purchased three of these. They work just great for about 2 years then start to leak slightly (1 drop by slow drop)...so we just use a new one every 2 years. The price is much better than a standard pipette head so we are happy with the product!
Pros: affordable, quick charge, charge holds long time, works great.
Cons: starts drop by drop leak after 2 years of use (not bad)