The GMS 1.20 2-stroke is the finest 1.20-sized glow engine on the market... at the $94.99 price point, anyway.

I've run some of GMS's smaller engines and I thought they were quite powerful and a great value. The 1.20 in particular has a bit of a reputation for being difficult to tune. If you're not very, very comfortable with breaking in and tuning 2-stroke engines, you might want to consider another choice. If you have some tuning experience, however, the GMS 1.20 is a bargain.