We started using Ariel back in the first decade of the 2000's. We were running a business then and had regular call for batteries for the work cars. After trying various suppliers we discovered Ariel and never looked back. Price, promptness, reliability and quality all excellent. Since selling our business 13 years ago our needs have been much more sporadic - in no small part because his batteries last so long (my last one 13 yeaars!). But our experience has been the same. Last week my brother-in-law drove over from Esperance in their bug camping rig. The deep cycle auxilliary battery was over-heating and breathing out Hydrogen Sulphide when they got here. The lovely guy at Ariel (I don't even know his name :( ) knew exactly what was needed, had it in stock, and had us sorted within an hour.
they really really know their stuff (you can also get batteries rapidly tested there if you're unsure of status) and I hope he's around for many more years.
PS. Don't be alarmed at the state of the shop if you visit. It's real 'old worldy', including the massive ancient tester on the bench that looks like it was retrieved from a tip but is still better than anything newer you can buy.