“I’ve worked with TTE to calibrate the hundreds of pipettes we have in the lab for about 5 years now. They do a great job and I’ve never had any issues. They’re super flexible with billing issues, and they always get the pipettes done when they say they will. If there’s an issue with one that requires further attention they give you a call and leave a note in the return box explaining the problem and they take care of the rest. Overall a great company to work with!”