As tech giant Apple (AAPL -0.10%) continues to threaten it and its key growth metrics remain tepid, I'm back to my Pandora Media (P) stalking ways.

Assuming most of you aren't familiar with my admittedly odd infatuation with Pandora Media, I've been following the company's soaring share price and still-unfolding economics for some time now, especially as new competition from the likes of Apple's iTunes Radio poses a new kind of threat to upend Pandora Media's early lead in online streaming radio.

A March to remember for Pandora Media?
One of the most helpful ways to monitor Pandora Media's business progress are the monthly user metrics updates it regularly provides for investors.

Source: Pandora.

And in the case of Pandora's March user metrics, there were arguably equal parts good and bad. Broadly speaking, Pandora users are utilizing the service more, which increases the number of total hours to which Pandora can serve ads. However, the pace at which it's acquiring new users is slowing, bringing Pandora Media alternatives like iTunes Radio into the discussion once again.

So just how big a deal is slowing user growth for Pandora Media and its investors? In the video below, tech and telecom specialist Andrew Tonner breaks down his thoughts on Pandora Media's current state of affairs plus some of the threats that now-rival Apple poses in the months ahead.