I am using hikashop about 4 months. Before I tried to use redshop and virtuemart. Also I tried tienda but it don't work on joomla 1.7 and 2.5.
First of all - I don't know when support of the hikashop is sleep. He will answer on all your questions in 3-4 hours! Every day!
Second is that this extension will work on all Joomla configuration. No special requirements! Great!
Third, you can tune all what you need! hikashop will work just as you expected!
Russian community active and you can talk Russian language on the forum!
International support is great!
I have bought Business version because I want that hikashop evaluate more!
Very small amount of languages.
First of all - there is no Russian language. If I try to install it I got the error that there is no ini file for Russian. Other extension don't try to copy files if they don't have they. So- this product is still in beta stage.
Second - very high requirements for hosting.
php_value max_execution_time 200 is too big!
Many errors while installation. On my local computer zend server was exhausted his memory (4Gb!).
Very unstable extension! It is not for practical use.
redSHOP has normal moderne hosting requiements.
We own www.redhost.dk and www.iredhost.com and both places you can install redSHOP with a 30 second time out and 30 second execution time and 48 mb memory allowed (you can also use more if you like).
We host 1000's of Joomla websites and specialize in Joomla hosting.
So NO redSHOP does not require alot in hosting - but it sounds like your homebrewed system surely isnt running on par with what you could expect.
Fair enough if your host is from the middle ages or your running it at home but dont come in here and do a 1 star review of redSHOP it self on a completely groundless basis.
As per languages it is all handled today through Open Translators and Transifix and we have Russian translators on the team too - Our translation manager Ole can be reached on firstname.lastname@example.org if you have more questions on that subject.