The biggest problem usually trying to decode unknown 433 Mhz transmissions is what kind of remote is it.
Rc switch only decodes the data format from PT/SC2262 data encoders, which while being quite common are not the only type.
You can sometimes guess whether RCswitch will work or not, by looking at what the remote does.
If its a turn something on or off type function, then there is a good chance that Rcswitch will work.
If however its a hold the remote button down and something happens until until the button is released type function, then its unlikely to work.