I purchased both this device and a competitor for use. I prefer this device, hands down. I have severe primary dysmennhorea - meaning painful, heavy periods. Ovira just works - plain and simple. I don't have to pop ibuprofin all day long just to feel functional on days 1/2, and when the pain level goes up, I can increase the intensity and feel better in moments, no waiting for meds to kick in. I'll list the pros/cons below, but believe me, the cons are nitpicky and small, this device is WORTH IT, and a cheaper investment than their competitors devices.
Pros: Cheaper than the competitors ($119 vs $199 to get started), fast shipping, excellent customer service (they got back to me within a few hours!). The leads are very long, and open wide, for a wide range of body sizes, or for targeting pain all on one side: one pad in front, one pad in back. For example, I'm anywhere from a size 14-16 and I have a lot of slack on the leads, they can open much wider if needed. The pads are large and easy to place on the painful areas. No issues with getting the pads placed on my belly, despite having some rolls! The Intensity levels of the device start very low, and can go very high, for a variety of pain levels. The included plastic disc is very, very useful for storing the love handles. It charges fast, and lasts about 8-10 hours on high intensity, I've gotten 12-14 hours on lower settings.
Cons: All minor, nitpicky things - I wish it initially came with an extra gel pad refill to get you started, you do need to purchase those in addition to the device. The gel pad refills are a bit on the pricy side ($35 for 3 cycles). Oviras pads are larger, and their shipping is faster than their competitors, so I'm not too bothered by this. The Press/Hold to turn on was confusing at first (I had to have someone explain it to me!).
Overall, the cons are small. The only thing I would think is that the refills may make this cost prohibitive for some women, but I think as this company grows and scales they'll be able to make them more affordable. (They also say 1 cycle for the pads, but I kept them fastidiously clean, and didn't use the device while exercising/sweating, and I got through 2 cycles easily). It's a great device, it's reliable, it works. I've gotten through three cycles so far with no pain meds!