Singing Pig

I have been introduced to a company based in Grenada who deal in this and have been returning profits of between 6%-15% each month.

The person who told me about them has invested a sum of money with them for nearly 18 months and has not had any problems except the odd late payment.

My question is what signals should i look out for before investing any money with them, their website does not give much info the link is www.sglholdings.com infact, based on the website alone i would not invest anything with them but the person who told me about them is a very shrewd investor and i trust them completely so hence my dilemma.

Any pointers greatly appreciated.

Tex