I just received my new IQC in Saphire. I'm completely happy with it. I've had an Acsent since 2018. It's a great vaporizer and still work great, I just can't get glass spacers anymore. I got a Miqro two years ago. It had an issue with the charge port plug loosening over time. Davinci replaced it promptly. I like the Miqro, just not the battery life. This IQC has great battery life, great vapor quality, it's very well made and easy to use. I've had only good experiences with Davinci, that's why I have three of their vaporizers. Now the app is another story. The app worked great for about 10 sessions. Now it shows the IQC connected, some settings work but time and temp screen do nothing now. I'll use the vape without the app. Five stars on the IQC, Davinci customer support and warranty service. No stars for the app.