I've been using eMobile since they started. At first the service was quite snappy and lived up to its claim - at least within the context of HSPDA capabilities. Recently I upgraded to the D21 version hoping to take advantage of increase in BW (up and down). Big mistake - there is absolutely no difference in the BW quality between my new D21 or old L series modem. eMobile is a rolling scam. If you're thinking about getting this service - think twice. The WIMAX services kill it on all accounts except for covereage.
I'd only consider eMobile in the context of getting one of the mini-laptop for free. Still requires a 2yr contract, though ....