yes ... I use both grabcar and uber. Especially when you are traveling at late night after drinking sessions or after visiting various night markets, taxis you hire from the streets might not wanna use meter. Uber comes in handy during that time.
The only downside is , its kinda hard to locate uber drivers when you are slightly away from town. Most of the drivers hang around sukhumvit areas or the city centre. The drivers I met are friendly and some do speak very good english as well.
You certainly can give uber a try.