This is how I have been doing all my editing for some time now. When I am creating copy I'm too close to it to catch some errors. Somehow it feels like my brain gets tied up in the message I want to say and refuses to see the actual words I wrote, if that makes sense. Usually have no issues catching syntax type errors, but it's the things that just don't seem to read correctly that I miss.
When I have it read back to me I catch a lot more.
I have not tried Funnelytics yet, but I have been tempted to give their free account a test run. Like @Wunderkind said above, if it really works as advertised and the integrations are easy to implement, it could really be a useful tool for brainstorming, implementing, and then monitoring sales funnels.
For client based work, it seems like the kind of visual layout that makes for an easy upsell.
If you scroll to the bottom of the page you will see an option that says Themes with a down arrow beside it. Click that and you will see a new theme option called Clicked Blue. Pick that and the forum will load as a more "traditional" blue and white color scheme.
I have looked at both of these too. This is my take on it.
Geru is probably fine if you are someone that needs to sit down and plan every step of a sales funnel out. Everyone probably should do that. You can do the same thing in a flow chart. It would lack all the fancy bells and whistles, but is more than adequate. However, if you are using it as a sales tool to clients, the output of something like Geru will look more impressive.
That being said, Funnelytics looks much more interesting to me. I have not tried it yet, but if it can really integrate well with a website and outside tools you might be using like an autoresponder, the fact that it tracks stats in real time makes it look like a much more useful tool.
I have not found any of the reviewers out there discussing its accuracy so far. The fact that they have an affiliate program severely muddies the waters when looking at reviews. I have not yet found one that shows a real live funnel that they have been running for a few months. It's all people just setting up new ones telling me how easy it is.
If it works as advertised, it could be great for identifying weak points in a business.
Please keep us updated how this goes. I know someone thinking about doing this. My guess is it won't impact your rankings much. It's basically the same as a business acquiring another one and when I have seen that happen there has not been a drop in rankings.