Considering swapping from Nest to Eufy

I've been considering switching from Nest cams to Eufy for a while now. Before investing hundreds of dollars in a new system, I wanted to hear from Eufy owners. I want a system that's great quality, stable, and has no monthly fee.

I am considering getting the E340 doorbell, S350 indoor and E330 outdoor cams.

My questions are:

• Is the app stable and can I see an ongoing livestream?
• How is the picture and sound quality at night? Will a light need to be turned on outside to have good outdoor quality?
• With 24/7 recording, can I go back to any part of the day and watch & download a clip, regardless of if motion was detected?

Lastly, it seems like Eufy is in the 300 series right now. Is a 400 series coming out soon, and would it be worthwhile to wait for the release?

Edit: Thank you all for your suggestions and insights! You've really helped put my mind at ease about the Eufy brand and its reliability. Based on your recommendations, I’ve decided to go with the S3 Pro instead of the E330, and I'll be getting the HomeBase too. I appreciate the help!