Reword the README a little

README.md

@@ -15,8 +15,8 @@ of the transport Key Performance Indicators (KPI) framework described at
 understand and explore the framework, and as such, should be regarded as a by-product of the framework rather
 than a work in its own right.
 
-The KPI metrics generated by Gelato provide a snapshot summary of a
-given MATSim model, and help compare different MATSim models and scenarios against each other.
+The KPI metrics generated by Gelato provide a snapshot summary of a given MATSim model, and help compare different
+MATSim models and scenarios against each other.
 
 
 # Installation
@@ -79,7 +79,7 @@ drwxr-xr-x@ 15 mickyfitz  staff   480B 13 Dec 15:17 ..
 
 # Usage
 
-You can run Gelato from the command line, directly from the jar file. The CLI is quite discoverable:
+You can run Gelato from the command line, directly from the jar file. The CLI is discoverable:
 
 ```shell
 java -jar target/gelato-0.0.1-alpha-with-dependencies-230f897.jar --help
@@ -112,7 +112,9 @@ java -jar target/gelato-0.0.1-alpha-with-dependencies-230f897.jar \
 ```
 
 We recommend using MATSim's output config file for the `-mc` parameter wherever
-possible.
+possible, because output config files have been validated by MATSim and used
+successfully to run a simulation. As such, they are slightly "safer" to use
+than "input" config files.
 
 Gelato will read in MATSim's output files and generate a number of compressed output
 files in the directory you specified via `-o`, giving you something like this: