It is tough to say which is a "better" reconstruction as there is no such qualitative measure as to which one is a "better" one as I assume your main goal is the final aesthetic outcome of the breast reconstruction. What is better for you may not be for someone else as everybody has different skin qualities, breast shapes, volume, size (even differences - more the norm than the exception) as no two breasts are exactly the mirror image or in perfect symmetry. The advantage of a single stage breast reconstruction however, is that it is one surgery for both the mastectomy and the breast reconstruction. Whether you qualify for that technique however is a decision made between you, your surgeons (oncologic and plastic) and your medical team, that is whether your breast skin and nipple areolar complex is safe to preserve given the stage of the cancer, the size of it, how far away is it from the nipple and other "personality" characteristics of the cancer that is biopsied that can be different in each individual as are the breasts. It is important to remember, that in either scenario, breast reconstruction at time of mastectomy whether implants are used as single stage or staged with tissue expanders or with your own tissue as from they tummy or back, all of these may require revisions in the future. There is always room for aesthetic perfection and improvement of results as the years go by and our bodies age and elasticity changes, weight gain / loss etc.... The short answer, is yes it is less times in the operating room and down-time from personal and professional life when same time implants are placed at time of mastectomy (again not every woman may qualify for this as it depends on the stage and other things mentioned above). The best candidates for same time implant single stage breast reconstruction are as in the case of Ms. Angelina Jolie, where she did not have active cancer, but had tested positive for the BRCA1 mutation therefore, she tremendously lowered her risk by deciding to remove both breasts and reconstruct at same time, but in her case her surgeon had decided to stage it with tissue expander first as some surgeons feel they can better control the final aesthetic outcome. Alternatively, some women may want slightly larger breast volume post reconstruction than their original breast size, and therefore, tissue expanders may be temporarily used for a short time to stretch the muscle and skin to minimize the risks of vascular problems to the skin envelope if a larger implant was used in the first stage, to protect the skin and the final aesthetic reconstruciton. Therefore, it is an individual choice, multifactorial in nature, but remember that you will be living with the reconstruction and that needs to be in the best possible aesthetic result and it is not always the best in one stage. Even with staged reconstruction, revisions are the rule than the exception, the trusted rapport that you have and the aesthetic sensibility and skill that your plastic surgeon has is key in making your reconstructive journey a satisfactory and rewarding experience for all involved. I hope this helped in answering some of your questions :-)