I've found Codeium pretty handy, especially for boilerplate-y stuff like unit tests, and it can very often "guess" what I'm going after especially if I eg have a TODO comment or something similar where I start completion. Doesn't always work but doesn't get in my way either, so overall it's been a benefit

edit: note that the language you write will likely be a factor. When I tried Codeium with Julia, the results were often pretty meh likely because it's a more niche language, but with eg Swift it's been fine