The small MTecs like the 1230/28 is today just a better then nothing option. Wouldn pay more then 15-20 EUR for it incl. 8 MB RAM and preferably FPU too.
This card puts is memory into ZII autoconfig adresspace, so if you install more then 4MB the PCMCIA-port is dead and an ZII board wont work with it either.
The bigger MTecs like the 1230/42 have AFAIK an own memorycontroller so you can install more then 8MB and it won`t block the PCMCIA port either.
In short: take this card only if it is cheap.