I was hoping someone who's using Pro Miner would chime in, but since not, I'll answer!
A few people are running it and yes, I'm better at coding than promotion

I hope you liked the You Tube videos - the voice-over was done by my partner.
All the current Ethereum miners are within a couple of percent of each other in terms of hashrate. The algorithm was designed to be memory-intensive and the limit is not the code now, it's the physical limit of the RAM on the GPUs.
The real difference between the miners is the uptime. We get over 99% uptime running Pro Miner on our rigs. There are 168 hours in a week, so losing a couple of hours a week due to a miner crash reduces your rewards by a little over 1%.
BTW, we've just released version 1.92 on the
websiteIt has improvements and fixes for few things - notably a bug due to IPv6 that meant the miner process would run, but it wouldn't start mining. Thanks to the person who reported this and worked with me to track it down and get it fixed.
Lastly, a request! If you do try Pro Miner and it doesn't work for you, please use the contact form on the website to let us know so we can fix it. Thanks.