Just read up on them yourself and make your own decision. I made a thread that hopefully could help you.
https://bitcointalk.org/index.php?topic=1045967.0Tip... Always refer back to the charts and be mindful of volume. If the chart looks bad, with prices going down or no volume, don't get in. No matter how "good" the "tech" is, trading/investing is still a risky endeavor.
Probably this is the best advice what you can get here. Don't follow anyone and anything without doing your own research first. Good advice in the right time is a really rare thing here.