It is estimated that Trump's tax plan will increase the national debt by $9.8 trillion over the next decade without significant cuts in government spending. Couple this with the fact that Trump wants to expand the military, we can expect to see those increases.
Furthermore, his tax plan is really regressive, the lower brackets see little to no relief and the top brackets see considerable relief.
The only good is that there are more incentives for saving and investment as long as interest rates stay as low as they are. Problem with this is that the middle and lower earners will not see the benefits of these breaks as they don't have enough money to invest or save.
Overall, his tax plan helps the rich and bankrupts the country.