I have a few colours in this Revlon range of polishes, mainly lighter matte ones.
I like the formula of the varnish itself makes applying easy and fuss free with a great finish (sometimes streaks but normally covered with another coat). It dries fast between coats (big bonus!) With the lighter colours you can get away with 2 coats but 3 looks better.
This polish does chip on fingernails which is a shame but Im yet to find one that doesn't (other than professional shellac) so no big deal really. I haven't tried it with the Revlon base and top coat so maybe that's where there secret lies to get 10 days wear!
I have had my Revlon polishes ages now and they have not gone clumpy or gross* they are just like the day I brought them.
*Other than the sparkle one I brought for feature nails called 'Cosmic Flakies' this has gone gluggy and I haven't had it long :(
I purchase my polishes on colour mostly and given that there are SO MANY in this range Im sure I will be bound to buy more.
I think my Revlon Nail Enamel is the easiest nail polish I have to use. I have a deep shiny green with a hint of blue, that I was given for a Christmas present. And I am very happy to have gotten it! It goes on without any lumps, after having it a year it's still in just as good condition, and it drys fast! However, I do find that it chips off within a couple of days - though this usually happens for me with nail polish.