M-40 Paintball is a pretty nice setup, they have an indoor paintball field setup in the bottom of a old grainery with many boxes and rooms to maneuver through.
They also have an outdoor field which is setup with wide drainage pipes and heavy plastic barrels. Most would prefer inflatables including myself, but the way they have it setup is nice. They seem to change their outdoor setup monthly for the hardcore guys that keep going back for more paintball. They have two snakes on both sides of the outdoor field and orange cones to mark starting zones.
My friends and I keep trying to look for new and different fields to explore our options, but with work in the summer M-40 is a great place to go when it gets cold out. Put on an extra sweatshirt and depending on the weather here in Michigan they will vary outside/inside play.
The price is $20 which includes 1 free CO2 fill and the option to use your own paint. I think its fair since others will charge you $15 and you have to use their field paint making it a lot more expensive especially if you went out and got some really nice paint the weekend before.
The referees at M-40 make the rules very clear and are very helpful. They encourage fair play and will try to base teams off of skill and gun type. Most of the time play is just supression or deathmatch (whatever you prefer), eliminate the other team or be eliminated. The refs vary the game play so noobs can enjoy themselves as for seasoned paintball players, if you have say 15 newbs renting guns they will play snipers. 3 hardcore paintball players with full auto guns against the 15 newbs. Their rentals are Pro Carbines and M98s which I think they have a fixed price for both of these.
Inside can become messy sometimes with a concrete floor with a lot of paint everywhere and the outside could be better with inflatables especially since you slide and run a lot more making hazards more probable.
Overall a fun place year round, being a Michigan player its great to be able to play during the winter indoors and out of the cold.