Having owned an Aspire Mini Nautilus (Bought from Creme de Vape) for over 3 years now, i really can't fault it.
These coils (both 1.6 & 1.8 ohm) perform reliably & continue to provide excellent service from my Aspire Mini.
When it comes to BVC coils, many will say that it's a bit of a lottery when buying replacement coils. I've seen reviews on so called "genuine" Aspire coils that have lasted only days & sometimes hours but this is subjective as to what juice you are vaping i.e. sweet juices tend to lessen the life of coils in my opinion, then there's degree of PG/VG mix etc.
Many of us find our search for replacement coils (et al) being driven by cost.
The temptation of a deal is never far away.
I've purchased cheaper genuine coils elsewhere & been bitterly disappointed in their short life - which is why i now only buy coils from Creme de Vape, as you can be assured that the product you are getting is the real deal.
In fact, I have bought juice & accessories elsewhere but always find myself returning to Creme de Vape for trusted information, competitive prices & good all round Customer Service. That's why I've recommended them to so many people.
When i was looking to stop smoking all those years ago, i'm so glad that i found i found a company which can still be relied on for quality vaping products & service.

I have few Nautilus Mini and the 5ml tanks personally I do not think there is anything on the market that beats them, the coils are easy to use and very easy to replace, service from Cloud9 is excellent, they respond to emails very quickly and use them whenever possible.

I've been using 1.6 Ohm BDC heads for some time. The 1.6 Ohm BVC head is definitely a step forward. Response time is faster, vapour production is maybe 30% greater and flavours (with tobacco and menthol) are clearer and cleaner.