Hard but awesome.
Yes, it is quite difficult, but with strategy is very possible. I am currently on wave 10 and have come close to beating this wave a couple times. From the reviews i have read people find the nuke level and suicide tank difficult. With the nuke true sight does work, and the enemy is destroyable in one smite. As with suicide tank 2 spore turrets in the center spot made that quite easy. If you are selective of which enemies to spite it also saves you a lot of energy, by predicting which enemies can be killed by turrets, etc. Great game great challenge!