Ugh, I actually got 2 Envy starter packs and then ordered the Blu before I found this site and did adequate research.
I'm hoping the Blu will still be ok. I really like that it comes with the charging pack. If it doesn't work out though, I'll be moving to a 510.
i was in the same boat remote...keep this in mind - blu has now changed their refund policy...they will deduct from your refund amount based on how many cartridges you use....so if you try it and don't like it / think you may want to return it, make sure not to use too many cartridges, and be sure you return them along with the kit...if you return it with zero cartridges, they will deduct $25 bucks from your refund!