Actually a lot can go wrong.
Some people want to put this experience behind them so quickly that they do not stop to consider whether they can successfully complete a deferred sentencing. Drug and alcohol dependency are major contributors to problems with probation. These diseases will be addressed during probation; however, a relapse will land you in front of the judge. This time, the judge has your previous guilty plea and you are facing the full range of punishment—this puts you 100% within the discretion of the sentencing judge.
Also, some people who are innocent of the charged conduct make the mistake of entering into this type of sentence just to free themselves of the burden of challenging the prosecution’s charge. This is a critical mistake. After entering your guilty plea, you will not be able to tell the judge at a revocation hearing that you were actually innocent.
Accordingly, while the deferred sentencing is an excellent option for getting your case dismissed, it must be approached with caution and after an open and candid discussion with your attorney.