I've never heard of either specific supplement. Beta Alanine is showing some promise as one of the supplements that might benefit us, especially when combined with creatine monohydrate.
But anytime you get sent to some blog full of testimonials...I get suspicious. Sounds like more marketing, less science.
I myself just ordered Results from AtLargeNutrition.com which is a createin/beta alanine supp. Since it only shipped yesterday I cannot comment but it should be fun to try out. I pretty much stick to that company's limited line of supplements, and I say that because they don't make too many.
Basically they only make what science shows as actually working. Thus, no 'NO2/nitric oxide' supps or any designer steroids/pro hormones. Just vitamins, protein, fish oil, creatine, and a few recovery products. Might be worth checking them out to see how it compares to what you found.
but I'd skip the Paraslim Force. Even the name makes it sound like garbage.