My two cents on houdini :
1. Subwoofer (external) is a must! It brings up the lower frequency of that amazing music. You will never get more sound out of any game. Older houdinis don't have a cabinet subwoofer.
2. Lower you Flipperbats a little bit and milk can shot can be repeated all day long and gets easy.
3. Learn how to shoot the "tight" shot for the trunk multiball from the right flipper. It is a very early shot but if you know how, it is easy to make without any risk, even when you miss.
4. Get all upgrades like EOS switches, new power supply and the capacitor kit. And MOST important, get fresh flipper mechanics. This game is a lot in multiball modes (with fascinating effects from the three hidden magnets) and the mechanics getting a lot of use.
5. Get never ever to the wizardmode... The code is loaded... OMG, there are modes everywhere and most of the best players I know will never see the wizardmode in years. So don't be shy, make this game a bit easier with the presets you can choose.
Houdini is not to compare with any other game. It is absolutely unique! Not a lot of flow, but the orbits are magical! So if you search for a flowing game... Walk on. It is a game that needs precision in every second.
I love mine, especially for the price of a pro.