Yay, during the last days I had the opportunity to test rather thoroughly the latest (2.15) vesion.
It ran like a charm ALL older famous titles I tested (and they were at least 30-40) plus modern games like Biggoil, the freely distributable Avalanche, Down etc. from Revival Studios (including their Essentials and Twirl demos), Lode Runner by dr beep, the 3 nice Mojon Twins games and all the titles by Bob Smith EXCEPT 3D Ant Attack, which loads, but produces colored and flashing squares during gameplay and then crashes.
So the compatibility rate is extremely high (much better than it was before v2.0) and the speed is more than satisfactory!!! I am truly impressed!
A silly issue that has nothing to do with the emulator itself (but thought of mentioning it, as I found it interesting) is that even though the older versions ran well under the SpEmu
software Spectrum 48k emulator for the Enterprise 128 by geco and were able to load converted Zeddy games from sound source, the newer version doesn't.
Mazogs on EP128 running on dr beep's 1.03 emulator under geco's Spemu.
Have a closer look
The 2.15 (and from 2.0 onwards) loads normally up to Zeddy BASIC cursor, but when it comes to loading Zeddy software it just crashes upon the header (Bytes:xxxx) of the program and resets the emulated Spectrum.
I haven't tried it yet with the hardware Spectrum emulator for the EP128, though!