Ridiculously buggy, albeit committed support (during work hours)

I don’t think that I have ever experienced a piece of commercial, paid software that was similarly buggy and slow. I find myself writing to their support every week, sometimes multiple times. Most issues get ultimately resolved but some don’t. I cannot count the times that I granted admin access to their staff already.
Unfortunately, there isn’t a lot of choice when it comes to translation plugins for WordPress and once you have chosen one, the vendor lock-in is almost impossible to break. So if you aren’t using wpml for your site already, please don’t. Or else you might come to regret it.