Let me start by saying, if you're looking for an affordable alternative to the original Levoit LV-H133 filter, this HSIAMEN replacement does the job—but with a few quirks.

The fit is PERFECT. I was skeptical at first, but it slid into my Levoit purifier like it was made for it (because, well, it is). No awkward gaps or misalignment issues.

Performance-wise? For everyday allergens like pet dander (I have two shedding machines—aka cats), it works decently. I noticed less sneezing within a day, and that 'stale pet air' faded noticeably after about 48 hours of continuous use.

Now, the elephant in the room: THE SMELL. Out of the box, there’s a strong chemical/floral odor (like someone dumped air freshener in a factory). It’s off-putting and lingered for nearly 3 weeks in my case—way longer than I’d prefer. Pro tip: Run the purifier on high in an empty room for a day before regular use.

Heavy-duty odors? Temper your expectations. While it helped with my cats’ litter box area, it didn’t fully eliminate smoke smells when I tested it near my kitchen (bacon grease aftermath was still detectable). Original Levoit filters handle this better.

The price is tempting—about 30% cheaper than OEM filters—but you sacrifice some air purity confidence. If odors/smells are your primary concern, spring for the original. For general allergen reduction on a budget? This gets a cautious thumbs-up.

Final verdict: A solid 7/10. Does the basics well enough, but that initial chemical scent and weaker odor neutralization keep it from being a home run.