Does my serve work against the Pros

So, whats my level and how good are my serves really I often receive comments about me serving to players that arent the same level as me. Whilst that may be true some of the time, given my current work, they have served me well over the years against most players. Ive put together many examples of my serves being effective against players my level or above. Whilst my serves dont always win me all my matches, they certainly raise my level and give me a chance to beat much better players. So, what is my level Im a former semiprofessional player and played most of my league table tennis in the Belgian National League. My top ranking in Belgium was A27 but the majority of the time I was B0. In the US my level is probably between 24502550, in England my level is probably around the top 20. Hopefully thats enough information to give you some context on my level. Im certainly not a world beater but Im a competent and competitive player. A regular comment I receive is