Lovo is an interesting program that I think has the potential to be really great in the future.
I've tried a lot of AI voice programs and LOVO's voices are definitely in the top that I've found. However, the best voices I've found are from murf.ai. Some of them sound so natural (and they also have the pronunciation feature).

One feature that Murf has that LOVO doesn't have is the ability to add pauses mid-sentence. Being able to say, for example, "Hello, [Pause 1sec] My name is Bob" makes it sound so much more natural. LOVO has a feature that you can add it to the end of a sentence, but I'd want to be able to add it mid-sentence also.

Murf also lets you upload a video so you can try to time your voiceover to a video. Sometimes you'll need to fix the timing after the video is already created and not being able to do so easily is a downside.

+ Able to preview individual sentences
+ Easy to replace voices
+ Certain voices sound very realistic (only tested in English)
+ Pronunciation editor
- Can't add pauses mid-sentence
- Can't upload a video to time the voiceover to match it