Different kinds of Av options

SUMMARY
 Visual aid are an important part of presentations, which emphasize and clarify main points, and improving the look and appearance of presentations and  make them more interesting and eye catching .they helps to get the attention of audience and make the presentation  interesting for the listeners.but on the other side they also have some disadvantages .,like some of the options from them are expensive , so everyone cannot afford it , some are hard , other are difficult to handle. so as we all knows that "coin has two side  head and tale" similarly AV also have some pros and cons

 Props provide a realistic reinforcement of massage content. it increase the participation  of listeners. that actually keep the  listeners on the track and they are active or concentrate like what is going on  in the presentation.however it leads the extra work. it required lots of efforts . It is also an expensive option of AV . Because it need to transporting and replacing worn objects. it is also a limited use with larger audiences
 Transparencies is also a kind of AV option . it gives professional  appearance with little practice . it is an easy task to prepare , maintain and update. it locate reliable equipment and limit information shown at one time. but on the other side it appear to some as an outdated  presentation method. hold speaker captive to the machine. it mostly provide poor and worse reproduction of photos and some graphics.So this provide the lower quality output , which put bad impression on the presentation.

 OPINION
I think that above summary says correctly that same as coin has two sides so as AV has two sides.
I believe that above provided different options of AV are quite helpful while delivering the presentation and try these options in your presentations and this will bring very good results

Question
Do you think that above stated questions are helpful?

 CITATION
https://www.google.ca/#hl=en&sclient=psy-ab&q=pros+and+cons+of+AV+while+presenting&oq=pros+and+cons+of+AV+while+presenting&gs_l=hp.1.0.35i39.4