It is a buy below $3.50 at best. They have a lot of good ideas but will be yrs before something becomes of it. DDD and SSYS are the only two companies worth investing in the 3D printing arena.
I disagree somewhat, ONVO is worth investing in.... Just not at these levels.
Unfortunately this stock is simply a trading game, look for another large decline to the sub $4.00 level soon.
Then get back in... my buy in point is $2.50, that's a steal.