Any moms out there have the Medela freestyle flex and want to offer their thoughts on it?

I have the Medela pump in style advanced, and it works fine but having to haul it to work in a bag is a pain. The only outlet in my office is away from my desk so I can’t continue working while pumping, just thinking the freestyle flex is the way to go but afraid it will decrease my milk supply which isn’t great anyways. How is the sucking power? Did you like it? How long does the battery last? TIA!!