Works well. Fills ridges and peels and grips polish. I'm very pleased.

Base coat and top coat are very particular things. There definitely seems to be chemistry involved, that is, your chemistry and how it works with the product. Just as some colours will look good on you and others won't, base coats can be really tricky. This ridge filler (let's face it, it's also a base coat) and I don't have great chemistry. It's kind of okay, but it's mostly just meh. It doesn't seem to help the ridges especially (my ridges are not terribly pronounced), and it tends to be quite sticky, even after it supposedly dries. I also find that it makes the polish take longer to dry, even when using quick-dry drops or quick-dry top coat. I'm sure this works great for some people, but for me, not so much, sadly. Definitely will not repurchase.

Ridge filler has been a HG for me for 10 years. It's an excellent product for smoothing out the nails prior to polish application. It also vastly improves applying pastel shades that have a tendency to be streaky. I've tried other ridge fillers by China Glaze, Essie, etc and wasn't impressed in comparison to OPI's. This is definitely an invaluable treatment in my manicure process. Big rave from me.

I find this thing awful. It goes on like white uneven heavy paint. It makes nail polish last way lees. I don't have ridges, but this base made my nails streaky. I bought it only because this was the single OPI base coat sold at my local store. I wish I had never done that. Awful, awful, awful!

Still forever a novice. So when I wondered why I wasnt getting that "smooth, fresh from the manicurist" look that I crave when I paint my nails, I found out I need ridge filler. I was in the beauty store for something else, but grabbed this too before I would forget. Pretty spendy, but for about $8 it was worth it. Not opaque, but dries to a powdery, opaque finish. It really does give something for nail polishes to grab onto, and well. With certain formulations it may take more than one coat to be honest, but my nails turn out smooth and pretty just like in the magazines. I top it off with my Seche Vite quick dry, and it might as well be bulletproof. Without it, I give it a week before anything chips, and that's fine; using this, my nails lasted up to 2 weeks before chipping. Whuuut? It's also not a royal pain to remove, and it doesn't stain my nails if I use something dark. Again, whuuuut? Anyway, the way I've been on a nailpolish kick, this may run out soon and with that, definite rebuy. I can't do without it!