Could you have really had the same workout without someone pushing you in a drill? Rarely is this true. Unless you are some special person that can maintain a high level of intensity, great. Dont pay the 25 bucks! But be honest, I dont think you could.
I couldnt tell if it was $25 each or $25 for all of you. Either way, you need to know what kind of practice you want. You still have to pay for the instructors time irregardless whether it is technical training or physical training. He still gets paid by the hour for his time.
I think you have to decide what you need. Some coaches attack better technique by working you hard on your conditioning. Others attack it from the "strokes" perspective. If you pick this person as your coach, make sure you communicate your goals and what areas you feel you need to improve in. If after a couple of sessions you are still not satisified, either move on or get the most out of your 25 bucks!