What I liked was the ease of creating the charts and since it's time consuming I could reasonably create charts for multiple currencies at the same time.
I created a legend so M1 = 2pips, M5=4pips etc. or something along those lines so when I tested different pairs I wasn't guessing which time frame was what size Renko.
As far as results my backtest and forward testing seem to correlate. Although, I did develope a nice strategy using az-invest renko charts but could not get the backtest to match with OVO results, not sure why.
One thing I found is setting the start Date &Time when creating the charts made a difference in backtesting results and in forward testing. This is a result of how the Renko charts are created and I think it's important to keep this in mind when creating your charts. This should also be your starting point when you go live. You could use your backtest data and than pick a Date & Time to start your live charts that correlates to a bar open/close with your backtest data.
I also always set the Rest Open on New Trading Day to True, if you don't you end up with these beautiful runs when the market gaps and in backtesting you will have trades that couldn't have existed but do and are profitable. Really skews your backtest results.
One thing I thought about trying was using the ATR option to create the brick size as I think this would help when going live as the bricks would increase or decrease in size as market volatility increased or decreased. However, backtesting this theory is very time consuming and at some point my patience ran dry.
I'm not in a position to help you backtest but if you have any questions feel free to ask.
All the Best