I tried it for a few games but considering that there are entirely free alternatives and that i am new to HUDs and need first to learn the basics went for easy poker hud instead. Yes the look of Jivaro is really good and i liked the way it shows the information but in my opinion the authors should consider following things to make it more widespread:
1. Bring back the basic free version but limit it to be usable just in
freerolls and tourneys/cash games with very low buyin. This way they will get the new players which like the look and simplicity of jivaro but are just not ready to give money for a HUD yet.
2. Offer also fixed price with support for the whole 1.x version cycle in addition to the monthly subscription options currently available. Many people prefer the one time pay option instead of giving money every month including me.
3. Reconsider their prices. You can get holdem manager for 100$ and get support for the whole 2.x version cycle which already continues for 2 years and most probably they will not issue version 3 soon. In every other aspect except the look holdem manager is much better than jivaro and can easily become cheaper also in a long run.
Of course this is just my opinion what can be improved. Authors have the right to charge whatever they think is reasonable for their work and everybody decides to pay or not.