Blessing v3 is an evolution of a martingale EA. As per experience for about a couple of months now, it has not (thankfully) blown my account and had no plans of blowing it up. There are really some scared factors that I felt everytime I use any martingale.
If you are using martingale, I suggest you to just target very low profits as this is relatively safe and that you can still stay in the trade. Although the results are not that great but then you can still survive with it.
There are assurance that if you do this you will never be encountering some blowing of accounts but then so does if you did it manually. So I suggest that you should have a good money management. There are traders who have been trading with martingale for around a couple of years already but they still manage to have an around 10-20% every month.