I am writing this only five days after receiving Ollie, so while I can't comment on any long term aspects, I will assure you that Ollie has seen a fair amount of action in the short time they've been with me. My first ever item I used during self care was a retired electric toothbrush (it was completely clean, I only used the backside, and I made sure it was safe beforehand don't worry) and although it was small, it had a surprising amount of power. Because of that, when I finally gained the courage to try actual toys, the cheaper ones that were easiest for me to get were not at all strong enough, and ones like Ollie one were too expensive.
However, I happened to come across Ollie on Black Friday, and while I was initially apprehensive, I said fuck it and got them. And THANK GOD I DID. Ollie is a beautiful creation! Easy to hold, sleek design, and oh so powerful. The vibrations are strong and soak into your bones, making it enjoyable even without direct contact. I was also worried about the sound, but the lowest setting is actually fairly quiet and still gets the job done. I don't regret a single penny I spent on this and if you are reading this and still debating getting Ollie, just do it! You will NOT regret it.