I am using 160by2 since many years but I am bored of it now.First they don’t provide sender number or ID which can acts as spam if the other doesn’t know about it.
I have also faced issue’s with website loading time, its very slow sometime.
Plus they don’t have other extra facilities(Quiz, games, etc) and their inbuilt messages are too outdated.
Good things : You can send free sms to many countries
Thanks,
BlogDum.com