The developer Datasouth is very quick to respond to support messages. I've also phoned them and received clear instructions.

Highly recommend this add-on.

Works perfectly and also sends the full cart details to Sagepay, would definitely recommend to anybody using Sagepay.

I was involved in the PRB review of this and was impressed by the code.

I then purchased a copy for a customer site and it has been performing well. The customer needed a small enhancement to get round a limitation of the actual Sage Pay API and support was fast and helpful.

A well deserved 5 stars.

Amazing support on this, any issues were dealt with quicker than I would have expected. Very much recommend.