Your question is a bit odd. LFE is just a tool, whether or not the tool will help you depends on what you're trying to achieve. Even if 100 people posted stories about LFE boosting their ranks in the SERPS it still wouldn't mean that LFE is right for your business model or level of experience. Look at the tool, think about what it does, if you still can't see a benefit to your particular needs then I wouldn't buy it.
I don't understand why you find my question odd?
The point of a tool like this and others is twofold surely...
1) To save time by automating procedure(s) in the building and managing of a link farm the purpose of which is to augment backlinks to other sites/pages
2) To make money by driving increased organic traffic to a money site through the improved rankings in Google due to increased (hopefully quality) backlinks produced by the link farm
So the question simply asks "does this tool work for the given aim?"
Whether it's right for any business model surely depends on whether the business model will benefit from improved SERPS rankings for given keyphrases and so is a red herring because the question is not about will it work for one particular business model.
I repeat the essence of the question is "does anyone actually get any improved rankings and thus extra traffic due to their use of this tool?"...
You have to admit that 6 pages into a sales thread full of "thanks for your help" posts yet almost no "wow this really works for me" testimonials is a bit odd?
I can see from the videos the engine works but does the car get to the destination or just rev up on the driveway making a nice impressive but essentially non-productive noise?
I am just a genuine potential customer (who already has invested in xrumer, senuke, thebestspinner, scrapebox, market samurai, micronichefinder, keyword elite, seo elite and many more "tools") wondering if this is a good investment of my time and hard earned cash...
If I see others saying it does work for SEO/Traffic purposes then I'll probably buy it as it could very well be worth my time investment...
BUT
It is very hard to tell when all I see is lots of "great help thanks" and no one really claiming real success with the product no matter how sweet it seems to run...
Even worse, now, several months after the first post and several pages into a lomg sales thread it's like the questions actually being avoided
$300 and a moneyback guarantee is irrelevant as I just haven't got time to waste learning a new thing and spending hours spinning and posting etc only to find it makes no difference...
This is still true whether the script is $3 , $300 or $3,000...
I'll try again:
I know it's a clever tool, I know Guerilla gives mega service (and well done for that Guerilla coz it's rare) but does it actually achieve higher rankings and thus drive organic traffic for anyone using it?