Are cheap wearable pumps worth it compared to a Spectra?

Specialist-subreddit consensus is mixed. Many reviewers report budget wearables like the Paruu and Momcozy lines work well enough as backup or on-the-go pumps, and a vocal minority use them as a main pump. But repeated threads note they don't empty as thoroughly as a Spectra and that suction can weaken over time, so they're often best as a complement rather than a full replacement.