Definitely alright to take it alone. The product is great stand alone. I've not gotten the opportunity to try the Hyper/Mass stack yet, but have done a bottle of MassFX solo during the AX sponsored "Get Hyper, Get Mass, Get Cash!" contest a few months ago. Awesome gains, insane strength.
We've got a whole log section from that contest on the AX forum. Drop by if you'd like to read sometime. Tons of real folks' experiences on it alone and stacked.
Good luck with it! Only word of advice...if you get pissed really easily, make sure to not punch your boss out while on this stuff. It might make you want to!!! :numbered: