I'm still waiting for my full-sized LimeSDR board to ship. It's scheduled for September 30. The LimeSDR Mini looks really cool. The main problem is that the FPGA only has 16k PLG. Also, one of the problems is that it only has one set of matching networks and I don't think It's great if you want to get started. For the price the only competitor is the ADALM-PLUTO which is worst. If anyone needs help buying antennas for the board just let me know.
ps: I don't recommend ordering the LimeSDR mini right now, wait until we get some input about the matching networks' range. The board claims to have a 10MHz to 3.5GHz frequency range but the usable range will be much shorter depending on the matching network specifications. If your goal is mainly cellular communication (GSM, LTE, etc.), I wouldn't worry a lot, that is the main focus on the project and the matching network will certainly cover those frequencies, but for other applications, please wait. I've already contacted the team and I'm just waiting for a reply.