I will like to contribute to this thread, and I owed Kelvin a review after I visited him for my aircon problem about a month ago.
I have visited dozens of workshops in Singapore and JB, and Kelvin's is among one of the best in terms of price and value.
My compressor and cooling were not working and sent it down to Kelvin for assessment. They patiently inspected and patiently explained to me. No hard sell at all.
Following the inspection, I went down again to proceed with the repair. I also included a routine service with CVT change. The total price is very good, but what's more important is the their altitude. They took their job seriously and with honesty. The job was completed in 3 hours. Fast and efficient. My aircon problems were totally resolved.
As for my basic servicing, they took the trouble to inspect on all areas including checking my back brake pad and doing wheel rotation, and sounded out to me some minor issues. They are quite detailed in fact , for the price I paid. Kelvin sounded out that my battery is turning flat and asked me to change. I did not do that. And a month later, in this morning my car cannot start. I immediately gave Kelvin a call, he agreed to come down and replace the battery:)
I would like to recommend him to anyone and am very impressed by how they carry out their business.
May your business continue to flourish Kelvin!