I’m using it currently. Not pregnant yet! Been ttc for 18 months, have been using Ovusense for this cycle and the 2 before it.
I’m a big fan. I don’t get up at the same time every day, so wanted something that didn’t require doing at the same time. I have used OPKs for several cycles, but found them confusing - I have multiple LH surges (probably PCOS), so couldn’t actually tell when I ovulated from those. I still use them for additional information, and OVusense has a little colour code so you can record when you get a positive if you use them.
I’d been keeping an eye on my cycle for a while, but I really like having all the information in one place and so clearly displayed. I’ve worked out a few things about my cycle that I hadn’t spotted before, and that makes me moe confident - I’ll be going to the doctor if I don’t get pregnant this cycle, so wanted the info at my fingertips.
It’s quite comfortable to wear, providing you do get it up far enough. Much like a tampon really. I’m not aware it’s there once I’ve got it in.
The only issue I’ve had with it is that in middle of the night confusion (women by DD1) I’ve dropped it in the loo twice when going for a wee 
. This is my fault rather than a problem with the device - my pelvic floor muscles haven’t been great since I had DD and you are really supposed to take it out for a wee and then pop it back in. I have also missed using it once or twice because I’ve nodded off after bding! It’s needs 4 hours of sleep to get a reliable reading, so if you do forget and wake up in the middle of the night you’ve got a decent shot of getting a reading.
Basically, I’m happy. But it was very expensive!