I have actually owned a stonic. I sold it after driving for 174km. It is the most boring car i have ever driven. There is a reason the car didnt do well in Korea and even in most other territories and likely one of the reasons it was introduced here as the kits were likely not very expensive. Here are my reasons for selling:
- The car is super hesitant in gear 1.
- It has terrible acceleration. It has better torque and power under the hood, but poor acceleration. Poorer than Swift.
- The interior is not very spacious, nor is it super comfortable. It might look good, but it isnt really.
- The maintenance isn't economical either and required at 3 months for keeping warranty (IIRC).
The only thing it has going for it, over the swift, is the kit. It has front + rear parking sensors (front parking sensors are useful) + more features inside, arguably better plastics, auto dimming IRVM, TPMS (although basic). Of all the cars I have owned, it had the most flawless paint quality (compared to the likes of Honda BRV, City, HRV, H6 HEV, Peugeot 2008, Suzukis etc) of the cars i have owned over the years.
I own a swift as well, and i can say with a lot of confident it is a way more fun car to drive. It has the usual "suzuki" characteristics (plastics, paint quality), but it is a good all around car.
hope this helps.