I would definitely recommend updating to 1.53, as it fixes bugs present in 1.51. On the other hand, 1.54 will be out in the next few weeks, which fixes some bugs in 1.53, so you may wish to wait for that. Other than the bug fixes and some minor new features, you shouldn’t notice much difference, though, so updating will not affect your work in progress in any negative way.
All the best,
Keith