Oh deary me!!
I started off writing a whole lot but realised it was more general information about reballing and reflowing issues that had nothing to do with this topic, so I've I've posted it in Off Topic here
Onto this one, these lot don't have a clue and make a whole lot of misleading and erroneous statements, typical of non-technical people who are out to try and frighten, impress, and finally draw in potential customers.
Please don't use them, you're likely to just waste your money and become very frustrated.
This comes from someone who does this work every day - today we've successfully reballed the ATI GPU and Intel Southbridge on a MacBook Pro - I'd like to see these jokers doing that!