Singleton | Dual Price Display

I tried this app because I need to show inc and ex VAT prices. It looks good, is customisable, and apart from a short time delay in appearing for the customer, does it's job very well. I have yet to use it long term.

Whilst much easier to install than rivals I've used, it did at first change the design of my site, changing background colour and checkout.
The developer was very helpful, making quick and simple adjustments that cured the issue with no fuss or issues for me once identified.