Stayed here since we took a very late flight into Phuket, and felt it would be wasted if we booked our pricier hotel for just a few hours sleep.
The reception had closed for the night (we arrived at 3:30AM), but there was a number to call the reception staff "for emergencies". The lady who answered was more than happy to check us in, and showed us to our rooms. Very helpful.
The rooms themselves were sufficient for what we wanted - a relatively clean place to freshen up, and rest for a few hours before moving to our main hotel.
It's a little dated, and the en-suite showers are more like wet rooms, but at this price-point it's difficult to fault. Ironically, their WIFI was faster and more stable than the 2 other hotels we stayed at which were 4-6 times the price of Karon Café Inn.
Location is perfect for those who want to be right in the middle of the vibrant night-life of the more laid-back Karon area.
Overall, a reasonable choice for those who are on a tight budget, or those who just want an "in-between" place to stay whilst travelling somewhere else.
Depending on which room you are given, do expect loud music from the nearby bars that are open late.