There are guys who clain 2 to 3 flips and their Gas Glow start right up.
AV8TOR is one of them.

I use a started on everything. I have a 24v Sullivan that does a pretty good job.
Although at times I have found it lacking. The batterys need to be freshly charged on bigger stuff.
Like my 32cc Super Tigre converted to diesel.

I believe with good tuning Gas Glow would be just as easy to start as a glow engine.
And I have some that flip start very easy.