I first picked up Original Source Mint and Tea Tree shower gel when I was heading away on holiday and in Asda picking up some miniatures like shampoo, toothpaste, deodorant, etc (not miniature vodkas or anything honest) and this was the one they had for shower gel other than Lynx which I simply didn't fancy at the time. Since trying this I have been hooked on the Original Source shower gels range (now including things other than shower gels I might add) and continue to use this one about 2 years after my first try. Here is why:

Pros:
The shower gel is of a good consistency as it is not too thick (meaning it won't froth up) or too liquid (so it slips through your fingers) which makes it easy to use the right amount and not waste a load of it each time which in turn means it lasts longer than other shower gels I have used.
The Mint and Tea Tree smells amazing and gives you a refreshing tingle as you wash which is great for on holidays where you are just out of the pool or as you are waking up and getting ready for a busy day (or going out following a busy day and needing a bit of a wake up call).
The bottle is well designed so allowing for you to easily hold this without it slipping from your hand in the shower and also making it easy to get just the right amount of shower gel each and every squeeze.
The shower gel used to be fairly expensive but of late has started to regularly be on offer for £1 a bottle meaning that it works out at good value for money.
A bottle will last you quite a few showers as (as per mentioned above) you can control how much you have each time easily thanks to the consistency of the gel.
It makes you feel clean and refreshed.

Negatives:
The bottle whilst excellent for all I stated above does take up space as it is large at the bottom end and thinner at the top so you will find it takes up more space on a shelf than you would have thought but the top narrowing does allow you to easily grab one from above.

Simply put I love the Original Source range but this is the original and best one for me as I have continued to use it for a number of years and still get that same great sensation each time I wash meaning I feel refreshed, clean and fresh each and every time.