As a buyer – Xcoins doesn’t seem stable enough at the moment to use for large purchases. Also it seems that the fees will be extremely high compared to other exchanges. However, if the only way you can acquire Bitcoins is through Paypal and you’re willing to pay the price this might be a valid alternative to Virwox.
As a seller – Even though the ROI may be high I don’t want to risk being flagged by Paypal, so at the moment I can’t recommend this to anyone else as well. If you don’t care if Paypal shuts down your account feel free to try your luck and I’d even appreciate if you can share your experience in the comment section below.