Hello MB addicts,
I have here the mini cmd 121p for about a year. Six months ago I added the 102p cab as an extension and a month ago I suddenly found an F1 head wondering around - I swear I didn't notice how it got here

The little 12" combo is the best bass amp deal I ever did, period. The combination of sound-size-weight-power-cost is unmatchable. It is also more yellow than any other.
Adding the 102p was a real upgrade to the sound. It adds obviously more volume but also a lot of bottom end and high mids from the 10's. The sound is more complex but retains the great transparency of MB and is very true to whatever instruments that is played. It's 3 speakers drinking 500W of pure natural bass sound. Incredible.
The F1 I got after deciding to convert all my gear to MB, hence selling a GK micro head, BagEnd 15" cab, still have Eden gear that needs to go...
The F1 is covered pretty well in other threads, especially compared to the LMII. Do some research for tones of info. Basically very similar to the LMII, smaller, lighter, less warm, quicker, more hifi sounding.
The F1 with the 102p cab is very nice, a lot of power and great defined sound, although I think it'll be a killer stacked with the 121H cab.
If any of you have played the 121H I'll be happy to read about it. Also it's price in the US.
MB Rules!