If, by 'reliable', you mean, 'does it work well?', then yes.
The only problem with data striping, is the increased risk of data loss due to drive failure - you have 2 drives which could break down - if either one suffers catastophic breakdown, all your data is gone.
Modern hard drives are highly reliable, so this is unlikely to be a problem for you - but irrespective of how you store your data, if it is important, then make sure you keep a backup.