OK, managed to download the trial...
Numbers is certainly different, I don't normally insert pics in spreadsheets never mind having several options to resize & frame them
The spinning beach ball turned up but as one can undo every change made since opening Numbers ~ Saving the pages fairly often sorts out that problem.
The borders take the place of freeze rows etc for most users. Still plenty of complaints that it's not Excel Plus but what it does do it does reasonably well for version 1.
Obviously some things will change with the first update but many of the complaints are unwarranted for a SS for the 'Rest of us'
If you take off your 'excel' hat before using Numbers as one has to take off a 'Word' hat before using Pages and play with it, it can actually make Spreadsheets fun.