i did not read all the comments above so forgive me if i am repeating what others may have said.
any good quality training is a good idea once you have some dives under your belt and you are ready for the next step. so if you have a local shop you work with and are happy with the level of instruction they provide, they why not do it.
on the other hand there is something to be said for getting instruction from other sources. it forces you out of your comfort zone by working with another instructor that you may not know. and it may expose you to types of training that you may not get at home. i myself have trained under at least 6 different instructors.
each dive op is different but my experience has shown me that they are usually more concerned with seeing how you are in the water rather than which cards you have in your wallet. so typically i see dive shops evaluate a new customer on a relatively easy dive before taking them to more "advanced" locations. ie: deeper, wall dives, stronger current, overhead etc
i have used some shops however that will refuse to take divers to certain sites without the proper certifications. but i think they are in the minority.
any good quality training is a good idea once you have some dives under your belt and you are ready for the next step. so if you have a local shop you work with and are happy with the level of instruction they provide, they why not do it.
on the other hand there is something to be said for getting instruction from other sources. it forces you out of your comfort zone by working with another instructor that you may not know. and it may expose you to types of training that you may not get at home. i myself have trained under at least 6 different instructors.
each dive op is different but my experience has shown me that they are usually more concerned with seeing how you are in the water rather than which cards you have in your wallet. so typically i see dive shops evaluate a new customer on a relatively easy dive before taking them to more "advanced" locations. ie: deeper, wall dives, stronger current, overhead etc
i have used some shops however that will refuse to take divers to certain sites without the proper certifications. but i think they are in the minority.