The BME 115 is definately the most light/powerful engine in the 100CC market.
3W/ZDZ/DA have more ressources available to repair and support their products while BME seem to be a one man show.

The only thing that bother me is the answer to the following question:
Where may i go to repair my engine, if BME owner makes a heart attack or become sick for a long period of time? This could be a concern for IMAC fliers who can not wait more than 2 weeks to get their engine back from the factory before the next event.

Daniel